Read and write Markdown, HTML and formatted notes, edit CSV and Excel spreadsheets, and rearrange PDF pages. Highlight a passage, find a word inside a file, and let AI apps on your computer work in it too.

Sign in to the app

On marearts.com, use your email and a 6-digit sign-in code; no sign-up or password is needed. In the app, use the licence details below.

The same account as the other AI Gadget apps

The email on the purchase, and the 16-character signature from that mail, or a licence key. A MareArts AI Gadget subscription opens the app.

After a sign-in the app also opens without internet for up to ten days. It sends anonymous usage statistics: the app, its version, the operating system and which screen was opened — never an email, file name, document or location.

AI agents

Claude, Cursor, Codex and other AI apps work in MARK

Connect an AI app on this computer and it can find, read and write your documents, change spreadsheet cells and formulas, reorder or remove PDF pages, highlight a passage, undo its own saves, save a PDF or HTML exactly as MARK shows it, switch dark mode, zoom or find words in the window, and install a MARK update. It uses MCP, the standard way AI apps work with other apps. If the app ever stops responding, the AI app can see that and restart it.

No restart. Then ask in plain words, for example "Show my three most recent documents in MARK" or "Save this note as a PDF the way MARK shows it." ChatGPT, the Gemini app and other AI websites cannot reach apps on your computer, so they are not on the list.

AI agents that work in a terminal can use the same tools from the command line, with the same rules. --tools lists them, --tool NAME key=value runs one, and the answer is JSON.

You stay in charge

AI apps can do what you do in MARK, and you choose how much. In Settings > AI agents a table sets, for Changes, Delete and overwrite, Updates and Security, whether AI apps may go ahead (Allow), must ask you first in the MARK window (Ask) or may not (Block); looking is always allowed. Delete and overwrite covers deleting a note, adding a folder and replacing a file; on Allow they happen at once and MARK tells you each time. An AI app can lower a choice but never raise it. Security covers signing in with the sign-in saved on this computer, signing out and forgetting it, changing the AI settings and connecting an AI app. It asks you every time unless you set it to Allow yourself, and Allow lasts 60 minutes unless you tick Keep on until I turn it off; while it is on, a band at the top of the window says so and has a Turn off button, and each step is written to a security log on this computer. Turning off Settings > AI agents stops every AI app at once, and it stays off until you turn it back on. AI apps reach only the folders you added, your notes folder and the files you opened. Every change an AI app saves is kept in the save history, and spreadsheets and PDFs keep a copy for 7 days. Your password or signature never goes to an AI app. Another account on the same computer cannot use your MARK: it answers only your own window, a second start of it and your AI apps.

Reading

Markdown, HTML and highlights

The sidebar is the document's own headings, and you can filter them. Tables, task lists, footnotes, syntax-highlighted code, LaTeX maths and Mermaid diagrams are drawn from the file. Images are read from the folder beside it, and only from there. An HTML file shows with its stylesheets, pictures and frames from its own folder. A link opens in your browser.

Select a passage and highlight it with Ctrl+H, the small chip that appears, or right-click. The mark stays in the app, not inside the file, and the Highlights panel lists every mark in the open document.

Editing

Source beside or above the rendered page

The source opens beside the rendered page (Ctrl+E) or above it, and the two sides can swap (Ctrl+Shift+E). Ctrl+Shift+S starts editing; the pane says Editing, and typing is saved about a second after you stop. Ctrl+S saves at once. A file changed outside the app is not overwritten: the app asks which copy to keep.

Code pasted into Markdown is put in a code block for you; Ctrl+Shift+V pastes it exactly as copied. A plain .txt opens in one pane, not a split. Saving it after formatting creates a .mtx note beside it and leaves the .txt on disk.

Notes

Five kinds of new file

New note (Ctrl+N) asks for a name and the kind of file: Markdown, a formatted Note, HTML, Excel or CSV. A note is one pane, with bold, italic, underline, strikethrough, three heading sizes, lists, alignment, fonts, sizes, colours, highlights, and undo and redo.

The Notes panel lists what you wrote, grouped by Today, Yesterday and month, and its search matches the text inside a note, not only its name. Every save also keeps a copy of the version it replaced, so a file overwritten by mistake can be recovered.

Spreadsheets

CSV and Excel, with formulas

An .xlsx or .csv opens as a grid you can type into. A cell takes a value or a formula: about 140 Excel functions work, among them SUM, IF, SUMIFS, VLOOKUP, XLOOKUP, INDEX/MATCH, TEXT and DATE. After =, click or drag over cells to put their range in. The Σ button (Alt+=) proposes the numbers above as a sum.

Right-click to insert or delete rows and columns (formulas that point at them move along), and to add, rename or delete sheets. Drag a column border to resize it, double-click to fit. Copy and paste work with Excel both ways. A workbook keeps its formatting, and one that could lose something by being saved here offers an editable copy instead. A CSV save changes only the rows you edited, and a Korean Excel CSV stays in its encoding.

PDF pages

Reorder, remove and add pages

A PDF opens with its pages in a panel beside them, as thumbnails or a list. Select pages and press Delete; drag them up or down to move them; add a blank page; or drop another PDF between two pages (or use Insert PDF). The file is saved a moment later, Ctrl+Z undoes even after that, and the version from before MARK's first change is kept as a backup.

A password-protected PDF opens to read. A digitally signed one is edited as a copy, so the signature stays valid. Open in system viewer hands the file to the PDF app you already use.

Search

A file name, or a word inside a file

Ctrl+K finds a file by name, and also files that contain the words, with the line under the name. The notes folder is searched whether or not it was added as a folder. Ctrl+F searches only the open document.

Other tools

Rename, filters, export and updates

Keyboard shortcuts

On macOS use Cmd in place of Ctrl.

Keys	Anywhere
Ctrl+O	Open a file
Ctrl+K	Search by name or by words inside a file
Ctrl+F	Find in the open document (Enter next, Shift+Enter previous)
Ctrl+N	New note
Ctrl+H	Highlight the selection
Ctrl+D	Star the open document
Ctrl+1–6	Contents, Folders, Recent, Favourites, Highlights, Notes
Ctrl+\	Show or hide the sidebar
Ctrl++ / - / 0	Zoom in, out, back to 100%
Ctrl+P	Print
F5 or Ctrl+R	Load the file again from disk
Esc	Close the open box or search

Keys	Editing
Ctrl+Shift+S	Edit the open document, or stop editing
Ctrl+S	Save now
Ctrl+E	Show or hide the source
Ctrl+Shift+E	Swap the source and preview sides
Ctrl+B / I / U	Bold, italic, underline
Ctrl+Shift+V	Paste exactly as copied

Keys	Spreadsheet
F2	Edit the cell
Enter / Tab	Next cell down / right (with Shift: up / left)
Alt+=	AutoSum
Ctrl+D / R	Fill down / fill right
Ctrl+Z / Y	Undo / redo
Ctrl+A	Select the whole sheet
Delete	Clear the selected cells

Keys	PDF pages
Delete	Remove the selected pages
↑ / ↓	Move the selected page up or down
Ctrl+A	Select every page
Ctrl+Z / Y	Undo / redo

Linux (Ubuntu 22.04 & 24.04) · macOS (Apple Silicon & Intel) · Windows 10 & 11

Folders copied to another disk on a schedule. Turn on Remote to open the same backup from another PC.

Sign in to the app

On marearts.com, use your email and a 6-digit sign-in code; no sign-up or password is needed. In the app, use the licence details below.

The console, not the copies

The email on the purchase, and the 16-character signature from that mail, or a licence key. A MareArts AI Gadget subscription opens the app. Scheduled copies keep running while you are signed out.

After a sign-in the console also opens without internet for up to ten days. It sends anonymous usage statistics: the app, its version, the operating system and which screen was opened — never an email, file name, backed-up file or location.

AI agents

Claude, Cursor, Codex and other AI apps work in BACK

Connect an AI app on this computer and it can check that everything is backed up, run or stop a backup, read the log, add or leave out folders, set the schedule and the keep rules, find an older version of a file and restore it, prepare a destination (list folders with their sizes, make or delete a folder), and install a BACK update. It uses MCP, the standard way AI apps work with other apps. If the app ever stops responding, the AI app can see that and restart it.

No restart. Then ask in plain words, for example "Is everything backed up in BACK?" or "Get yesterday's version of budget.xlsx back from BACK." ChatGPT, the Gemini app and other AI websites cannot reach apps on your computer, so they are not on the list.

AI agents that work in a terminal can use the same tools from the command line, with the same rules. --tools lists them, --tool NAME key=value runs one, and the answer is JSON.

You stay in charge

AI apps can do what you do in BACK, and you choose how much. In Settings > AI agents a table sets, for Changes, Delete and overwrite, Updates and Security, whether AI apps may go ahead (Allow), must ask you first in the BACK window (Ask) or may not (Block); looking is always allowed. Delete and overwrite covers deleting backups or versions and restoring over existing files; on Allow they happen at once and BACK tells you each time. An AI app can lower a choice but never raise it. Security covers signing in with the sign-in saved on this computer, Remote access (letting other PCs in, or a new Remote link), changing the AI settings and connecting an AI app. It asks you every time unless you set it to Allow yourself, and Allow lasts 60 minutes unless you tick Keep on until I turn it off; while it is on, a band at the top of the window says so and has a Turn off button, and each step is written to a security log on this computer. A restore into the MareArts Restored folder replaces nothing. Turning off Settings > AI agents stops every AI app at once, and it stays off until you turn it back on. Your password, signature and the Remote access link never go to an AI app, and another PC that opens BACK cannot set up or use AI. Another account on the same computer cannot use your BACK.

Overview

Is everything copied?

The first screen says whether the folders are up to date, when the next check runs, and how much room is left on the backup disk. A full disk is named on that line. A run started here shows the live log.

Folders

Sources, one destination, and delete

Add as many source folders as you like. They all copy to one destination. Each row shows the folder, where it lands, and both sizes. Patterns under the list are left out of the copy.

Delete folder removes that folder on the destination, including its earlier copies. The app asks again, and refuses while a run is in progress. Removing a source from the list does not delete those files.

Choosing a folder

The folder picker shows how full the drive is and how big each folder is. New folder makes one where you are; Delete this folder removes an empty folder, or moves one with files to the Trash of its own drive. Folders BACK uses, the drives themselves, your home and system folders cannot be deleted, and nothing can be deleted from another PC.

Schedule

Daily, weekly, or monthly

Runs use the operating system's own scheduler. They continue with the window closed. A lapsed subscription closes the console, not the backups. Only one backup runs at a time.

Activity keeps the log of each run. Runs older than the number of days you set are deleted, and at least a few recent ones are always kept. The default is 90 days, and at least five.

Restore

A file from an earlier moment

Pick a folder and a moment, including files you have since changed or deleted. Download one file, or restore it back onto the source.

Another PC

Open this backup from the other computer

Remote is off until you turn it on: Settings, then Remote, then Let other PCs open this app. Off, only this computer can open the backup, and Windows asks no network question. The first time you turn it on, Windows may ask once to allow network access: choose Allow.

Settings then shows the address of this computer. On the other PC, open that address and sign in with the same MareArts account. The bare address, without the port, is a different service. Sign out other PCs ends those sessions.

On disk

Plain folders, not an archive

Copies are made with rsync into plain folders. There is no archive format, no database and no encryption layer, so the files can be read with the file manager on any machine.

target/
├── current/      the latest copy, mirroring your sources
└── .versions/    one folder per run, holding what changed
    ├── 2026-04-22/
    └── 2026-08-08/

A new file goes into current/. A modified one is updated in current/ and its previous copy moves into that run's version folder. A deleted one leaves current/ and is preserved in the version folder. Only changed files are stored, but each is stored whole.

The copies go to the disk you pointed the app at. Nothing about their contents leaves the computer.

Settings

Test builds stay off

Settings has a switch for test builds. It is off unless you turn it on, and a test build never appears on the download page.

Linux (Ubuntu 22.04 & 24.04) · macOS (Apple Silicon & Intel) · Windows 10 & 11

Cut video on a timeline and place clips on a free canvas. Record a web page or your screen, zoom into part of a clip, add captions and background music, and hide faces and number plates. Same sign-in as Markdown Studio, Backup System and Image Viewer.

Sign in to the app

On marearts.com, use your email and a 6-digit sign-in code; no sign-up or password is needed. In the app, use the licence details below.

The same account. Nothing extra to buy.

The email on the purchase, and the 16-character signature from that mail, or a licence key. A MareArts AI Gadget subscription opens the app.

After a sign-in the app also opens without internet for up to ten days. It sends anonymous usage statistics: the app, its version, the operating system and which screen was opened — never an email, file name, video or location.

AI agents

Claude, Cursor, Codex and other AI apps work in VIDE

Connect an AI app on this computer and it can make and open projects, bring in videos and pictures, record a web page, put clips and captions on the timeline, cut, join and change speed, zoom into part of a clip, add background music, hide a face or a number plate with a mosaic that follows it, export the MP4, pause or stop a screen recording, and install a VIDE update. The window shows each change as it happens. It uses MCP, the standard way AI apps work with other apps. If the app ever stops responding, the AI app can see that and restart it.

No restart. Then ask in plain words, for example "Put interview.mp4 in a new VIDE project with the title Site visit, and export it." or "Blur the number plate in the second clip." ChatGPT, the Gemini app and other AI websites cannot reach apps on your computer, so they are not on the list.

AI agents that work in a terminal can use the same tools from the command line, with the same rules. --tools lists them, --tool NAME key=value runs one, and the answer is JSON.

You stay in charge

AI apps can do what you do in VIDE, and you choose how much. In Settings > AI agents a table sets, for Changes, Delete and overwrite, Updates and Security, whether AI apps may go ahead (Allow), must ask you first in the VIDE window (Ask) or may not (Block); looking is always allowed. Delete and overwrite covers deleting a project or a source and exporting over a file; on Allow they happen at once and VIDE tells you each time. An AI app can lower a choice but never raise it. Security covers signing in with the sign-in saved on this computer, starting or resuming a screen recording, taking a picture of your screen, changing the AI settings and connecting an AI app. It asks you every time unless you set it to Allow yourself, and Allow lasts 60 minutes unless you tick Keep on until I turn it off; while it is on, a band at the top of the window says so and has a Turn off button, and each step is written to a security log on this computer. The window shows each change as it happens. Turning off Settings > AI agents stops every AI app at once, and it stays off until you turn it back on. Your password or signature never goes to an AI app. Another account on the same computer cannot use your VIDE.

Projects

A poster for each project

The home screen is a poster grid. New starts an empty project. Open attaches media you already have. Each card shows that project's folder and how much space it uses. Open folder opens the folder in the file manager. The card itself opens the project. Auto, Light and Dark sit in the footer; the moon in the editor does the same switch.

New project

Size and frame rate

Name it, then pick a format. 1080p, 720p, 4K, vertical 9:16 and square are presets. Width, height and frame rate can be typed instead. Create opens an empty timeline at that size.

Import and split

Picture on L, audio on A

Import puts a file in Sources. Drag it onto L1 or L2, or onto the viewer. Split cuts at the playhead, so one clip becomes two. The filmstrip and the waveform are that clip.

Record a web page

Smooth on any computer, even without a graphics card

File > Record a Web Page… takes an address, how many seconds of the page to record and the sharpness (2× for sharp zooms). VIDE opens the page in Google Chrome or Microsoft Edge without a window and runs it on its own clock, so every frame is taken and the clip plays smoothly at 30 frames a second, whatever the computer. To skip the slow parts, pick a second from which the page plays 2×, 4× or 8× faster; a small ►► 4× text sits over the fast part, and you can change or delete it like any text. The clip lands at the end of the timeline.

Other tools

Speed, record, text, mosaic

Export

An .mp4 of the timeline you see

Size and frame rate start from the project. Quality is Low, Medium, High or Best. The bar says Opening until the first frame, then Encoding. The file lands in that project's Publish folder unless Browse picks another place. If the computer has a GPU this build can use, decode and encode go through it; otherwise the CPU.

Linux (Ubuntu 22.04 & 24.04) · macOS (Apple Silicon & Intel) · Windows 10 & 11

A picture viewer for the whole computer. Browse folders, see every picture by the day it was taken, group a trip or a party into one event, find the same picture saved twice, make an album, look at one large with its camera details and place, and resize, convert, rename or rotate many at once. Same sign-in as Markdown Studio, Backup System and Video Editor.

AI agents

Claude, Cursor, Codex and other AI apps work in Image Viewer

Connect an AI app on this computer and it can find pictures by name, date or folder, look at a picture (AI apps that read images see it), tell when and where it was taken, group pictures into events, find copies, make an album, rename many at once, resize, convert and rotate, make folders, copy or move pictures, and install an Image Viewer update. It uses MCP, the standard way AI apps work with other apps. If the app ever stops responding, the AI app can see that and restart it.

No restart. Then ask in plain words, for example "Find my photos from Lisbon in Image Viewer." or "Make 1600-pixel copies of the pictures in Desktop/Event." ChatGPT, the Gemini app and other AI websites cannot reach apps on your computer, so they are not on the list.

AI agents that work in a terminal can use the same tools from the command line, with the same rules. --tools lists them, --tool NAME key=value runs one, and the answer is JSON.

You stay in charge

AI apps can do what you do in Image Viewer, and you choose how much. In Account > AI agents a table sets, for Changes, Delete and overwrite, Updates and Security, whether AI apps may go ahead (Allow), must ask you first in the Image Viewer window (Ask) or may not (Block); looking is always allowed. Delete and overwrite covers deleting, moving, deleting originals after converting, rotating in place and replacing files; on Allow they happen at once and Image Viewer tells you each time. An AI app can lower a choice but never raise it. Security covers signing in with the sign-in saved on this computer, signing out and forgetting it, changing the AI settings and connecting an AI app. It asks you every time unless you set it to Allow yourself, and Allow lasts 60 minutes unless you tick Keep on until I turn it off; while it is on, a band at the top of the window says so and has a Turn off button, and each step is written to a security log on this computer. Resizing and converting make new files, and rotating keeps the original unless you say otherwise. Turning off AI agents stops every AI app at once, and it stays off until you turn it back on. Your password or signature never goes to an AI app. Another account on the same computer cannot use your Image Viewer.

If Image Viewer stops responding, app_status says so and the other tools do not open a second copy; restart_app closes your stuck copy and opens it again (only while AI agents are on and Delete and overwrite is Allow). If the window's page goes blank, Image Viewer loads it again by itself, and reload_window does it on request.

Find a folder

The folder tree, with back, forward and a path you can type

The Folders tab starts at Desktop, Documents, Downloads, Music, Pictures, Videos, Home and Computer. A click on the arrow opens or folds a folder; a click on the name shows its pictures. The tree opens down to the folder you are in, and stays folded where you folded it.

Above the pictures sit back, forward and up, and the folder's path. Type or paste a path there and press Enter to go straight to it. View as switches between icons, a list with details, and the large picture; Sort orders by name, folder, date, date taken, size or type; the slider at the bottom sets the icon size.

All pictures

Every picture on this computer, by the day it was taken

The All tab shows every picture the app has found on this computer in one long grid, newest first, by the date the camera wrote into the picture (or the file's date when there is none) — so photos from a phone, a camera and a backup folder line up as one day. The panel lists the dates: Latest (Today, Yesterday, This week), then each year by month, with a bar for how many pictures each holds. A click on a date jumps there. Each year folds to one line with its count — Latest and this year start open, earlier years start folded — the arrow folds or opens a year, and a click on the year opens it and jumps to its first picture. The app remembers what you folded.

Finding pictures runs in the background and keeps going while you work. It reads the computer's own disks and skips system folders, caches and network drives. The list stays on this computer.

Events

A trip or a party, from every folder, as one event

The Events tab groups the pictures taken close together, by the day and hour they were taken, wherever they are saved. Each event shows its days, how many pictures it holds, from how many folders, and a cover. A click jumps to where it starts in All. Right-click an event to make an album of it.

Duplicates

The same picture saved twice, and the space the copies take

The Duplicates tab looks for exact copies — the same picture saved twice, a folder copied as a backup — and lists each group with where every copy is and how much space the extra copies take. It only reads pictures of the same size, remembers what it learned so the next search is quick, and can be stopped at any time. It never deletes anything; you decide which copy to keep.

Make an album

Chosen pictures or a whole event, in one folder and one PDF

Pick pictures, or right-click an event, and choose Make album… (Ctrl+Shift+A). Image Viewer copies them, in order, into a new folder with the name you give — the dates of the pictures are suggested — and can also make one PDF of the album, one picture per page, to print or share. Your pictures stay where they are. When it is done, Image Viewer opens the new album.

Recent and Favorites

The pictures you opened, and the ones you starred

Recent lists the pictures you picked or opened, with a small picture, its folder and when you opened it, and below them the folders you visited. Clear empties it.

Favorites lists the pictures and folders you starred. Star a picture with S, with the star in the preview, or with Image → Add to favorites; several selected pictures are starred together. For a folder, right-click it and choose Add to favorites. The × on a row takes the star off. A click on a picture in either tab shows it right there without leaving the tab; a double click opens it large.

Look at a picture

Large view, full screen and slideshow

Double-click a picture or press Enter for the large view. The arrow keys, Page Up and Page Down, Space and Backspace step through the folder; the strip at the bottom shows the neighbouring pictures. Zoom with the toolbar, with + and −, or with Ctrl and the wheel; 0 is actual size and 9 fits the window. Pages shows two pictures side by side. F11 or a double click goes full screen, where the controls hide until you move the mouse. The Slideshow menu starts a slideshow and sets how long each picture stays.

Photo details and place

Read from the picture itself

Info (F12) shows what the camera wrote into the file: when it was taken, the camera and lens, and the exposure — shutter, aperture, ISO and focal length. A picture with a GPS position shows the nearest town, region and country, the coordinates and altitude, with Open map and Copy. Town names come from a list inside the app, so the position leaves the computer only when you press Open map.

Select and edit

One picture or many

A click selects a picture: it sits in a tinted, rounded frame with a check in its corner, and the preview on the right shows it with its details; with several picked, the preview shows each whole picture with its name, and the × on one takes it out of the selection. Drag across empty space to draw a rectangle: every picture it touches is selected, and the grid scrolls when you reach its edge. Shift-click selects the pictures in between, Ctrl-click (Command-click on a Mac) adds one, and Ctrl or Shift with the rectangle adds to what is already selected. A click on empty space clears the selection. While several pictures are picked, each one shows a round check: a click on the round check adds that picture or takes it out, and a click on the picture itself picks just that one. Select on the toolbar turns every click into adding or removing. Ctrl+A selects all, Ctrl+I inverts the selection.

Pictures move and copy as in a file manager. Cut, Copy and Paste (Ctrl+X, Ctrl+C, Ctrl+V) work between folders, and a cut picture stays dimmed until it is pasted. Drag pictures onto a folder in the tree, or in Recent or Favorites, to move them there; hold Ctrl (Option on a Mac) to copy instead. A name that is already taken becomes “name (2)”, so nothing is overwritten.

Work on several pictures — rotating, resizing, converting, copying, moving or deleting — shows its progress at the bottom of the window: what is being done, which picture, how far along, and a Stop button that ends the job after the current picture.

Resize

See the result before you press Resize

Resize sizes by scale, by the long side, or by width × height, with ready presets. Width and height show together: while the link between them is on, typing one side fills in the other from the picture's shape (each picture keeps its own shape when several are resized). Turn the link off to set both sides exactly, then keep the ratio and fill the spare space with a blurred copy, a colour or nothing, or fill the frame and crop from a side you choose. The preview shows the result and the new size. Save copies keeps the originals and never overwrites an earlier copy; Replace originals writes over them. The edited pictures stay selected and show their new size at once.

Search

Pictures and folders by name, in about a second

Type in the search box at the top right (Ctrl+F) and press Enter. The results show the folders and pictures whose names match, across everything in All pictures.

Keyboard

Ctrl is Command on a Mac

Account and privacy

App sign-in, and nothing leaves the computer

On marearts.com, use your email and a 6-digit sign-in code; no sign-up or password is needed. In the app, use the licence details below.

Sign in with the email and the signature or licence key from your purchase email. A MareArts AI Gadget subscription opens the app. If another MareArts app on this computer is signed in, Continue uses that account — and only the account the screen shows.

Settings has Sign out, which keeps the account for Continue, and Sign out and forget, which removes the account from Image Viewer on this computer: until someone signs in again by typing, no saved account is offered, not even another app's. The sign-in form does not remember typed email addresses.

The picture list, Recent and Favorites stay on this computer. The app offers a newer version when one is published.

After a sign-in the app also opens without internet for up to ten days. It sends anonymous usage statistics: the app, its version, the operating system and which screen was opened — never an email, file name, picture or location.

Linux (Ubuntu 22.04 & 24.04) · macOS (Apple Silicon & Intel) · Windows 10 & 11

Share this computer's screen, or find another REMO host on the same network and control it — even end a program that hangs there, or restart it. Same sign-in as Markdown Studio, Backup System, Video Editor and Image Viewer.

Sign in to the app

On marearts.com, use your email and a 6-digit sign-in code; no sign-up or password is needed. In the app, use the licence details below.

The email and the signature from the purchase mail

A MareArts AI Gadget subscription opens REMO.

After a sign-in REMO also opens without internet for up to ten days. It sends anonymous usage statistics: the app, its version, the operating system and which screen was opened — never an email, file name, picture of your screen or location.

AI apps

Claude, Cursor, VS Code, Codex, Gemini CLI or any MCP app

An AI app on this computer can use REMO like you: see whether the screen is shared and who is watching, start sharing with the password you saved, stop, change the picture or the screen, disconnect a viewer, move the clipboard and install a REMO update, and restart REMO if it ever stops responding. The buttons connect Claude's app, Cursor and VS Code in one click; for Claude Code, Gemini CLI, Codex or any other MCP app, pick it and copy the line shown.

AI agents that work in a terminal use the same tools from the command line, with the same rules. --tools lists them, and each --tool answers in JSON.

You stay in charge

AI apps can do what you do in REMO, and you choose how much. In the account menu a table sets, for Changes, Delete and overwrite, Updates and Security, whether AI apps may go ahead (Allow), must ask you first in the REMO window (Ask) or may not (Block); looking is always allowed. Delete and overwrite covers disconnecting a viewer and replacing the clipboard; on Allow they happen at once and REMO tells you each time. An AI app can lower a choice but never raise Security. Security covers starting a share and sharing automatically at start-up, the share password, signing in with the sign-in saved on this computer, trusting or forgetting a computer, changing the AI settings and connecting an AI app. It asks you every time unless you set it to Allow yourself, and Allow lasts an hour unless you tick Keep on until I turn it off; while it is on, a band at the top of the window says so and has a Turn off button, and each step is written to a security log on this computer, without passwords. With Security on Allow an AI app can also set the share password of a computer nobody can reach to type it; on the command line it is read from standard input, never from the line itself. Turning off Let AI apps use REMO in the account menu stops every AI app at once, and it stays off until you turn it back on. Signing in with a typed password and viewing other computers stay with you.

Share

This screen, on the local network

Sharing needs a password of four characters or more; viewers type it to connect. Pick the picture — Best (sharp, 30 fps, light on the network), Fastest (lowest delay, up to 60 fps) or Lightest (smaller, 15 fps) — and the screen when there is more than one. While sharing, REMO lists who is viewing and can disconnect each of them, and the picture can change without anyone reconnecting.

The graphics chip does the work where there is one: NVIDIA NVENC, Intel Quick Sync and AMD on Windows, and NVENC on Linux. A 4K Windows screen goes out at 30 frames a second in Best and 60 in Fastest. Without such a chip REMO still encodes in hardware where it can, and sends JPEG otherwise. While someone watches, the screen does not turn off by itself.

With Share automatically when this computer starts on, the share comes back by itself after a restart and after every update, with the same password, and REMO is started again within minutes if it ever stops; quitting REMO yourself still quits it.

REMO checks the settings sharing needs: Screen Recording, Accessibility and Local Network on macOS, and the firewall on Windows. If one is off, a notice stays at the top and says what stops working without it, with a button that opens the right setting and Check again. On Windows the button asks Windows for permission and allows REMO through the firewall. The notice goes away once the setting is on.

View

Hosts on this network, then the picture

REMO lists the computers sharing on this network and updates the list when one starts or stops; Refresh looks again. Pick one, type its password, and the picture fits the window. Your own pointer moves over the picture with no delay; clicks and keys go to the host, and Ctrl+C / Ctrl+V copy text and files both ways. The bar has View only, 1:1, Full screen and a Keys menu for keys your own computer keeps, such as the Windows key and Alt+Tab.

The picture, keys, password and clipboard travel encrypted (TLS). REMO remembers each host the first time it connects and warns, instead of connecting, if that computer later answers with a different identity.

Computer

A program hangs over there: end it, or restart the computer

On a computer that shares with a password, Computer in the bar opens Programs: that computer's own programs, busiest first, with a search box. End asks once more in the row before it closes the program. REMO itself and the programs that keep the person signed in are locked, so the view cannot cut itself off.

Restart says first whether the computer comes back by itself (automatic sign-in and Share automatically on) and connects again when it is back. The person at that computer sees who ended or restarted what. AI apps can do the same through the clipboard link you opened, and always wait for your Yes.

Linux (Ubuntu 22.04 & 24.04) · macOS (Apple Silicon & Intel) · Windows 10 & 11

See the whole computer: CPU, memory, GPUs, disks, network, temperatures, processes and alerts, live and as a history kept on this computer for up to a year. Alerts can go to Discord or Slack. MSYS only looks — it never ends a process or changes the computer. Same sign-in as the other MareArts AI Gadget apps. Tell us what you think with the Feedback button in the app.

AI agents

Ask your AI app what is slowing the computer down

Connect an AI app on this computer — Claude, Cursor, VS Code, Codex, Gemini CLI or any MCP app — and it can read the same numbers you see: what uses the CPU or the GPU, which disk is filling up, what has been running hot over the last hour or the last month. It can change the dashboard view, the history log and the alert rules, and test a webhook. It can also open a screen in the MSYS window to show you. Connect one in Settings > AI agents. AI apps cannot end a process or change the computer, and cannot see or add a webhook address; signing in and the AI settings always wait for your Yes in the MSYS window.

Then ask in plain words, for example "Which process is using the GPU?" or "Has the CPU been over 80 % in the last 15 minutes?"

AI agents that work in a terminal use the same tools from the command line: --tools lists them, --tool NAME key=value runs one, and the answer is JSON.

Dashboard

Every part of the computer, live

Each card shows the number now, a graph and the low, average and high for the time you picked at the top (1, 5 or 15 minutes, or 1 hour). The dashed line is the alert limit. Under the graphs: every disk with how full it is, the network adapters, and every temperature sensor the computer gives.

Pick one of ten views at the top — Cards, Compact, Large graphs, One per row, Numbers, Gauges, Bars, One graph, Core map or Strip. Every view keeps its cards the same size while the numbers change. On the Dashboard Tab steps through the views and 1–9, 0 pick one; Alt+1–5 open Dashboard, History, Processes, Alerts and Settings from anywhere.

History

A day, a week or a year back

MSYS keeps one row a minute — the average and the highest — on this computer only, while it runs and you are signed in. Pick 1 day, 1 week, 10 days, 1 month or 1 year, or any dates, and see CPU, memory, GPU, temperatures, disk, network and the fullest disk as graphs, with the average and the highest for that time on top. It opens on 1 week and deletes rows older than 1 month; you choose both in Settings > History log, and Delete all empties it.

Processes

What is busy, sorted the way you need

Sort by CPU, memory, disk or CPU time, or type part of a name to filter. MSYS only looks: nothing here ends or changes a process.

Alerts

What is over its limit, now and earlier

A red card for each part over its limit, with when it started. The tab shows how many. CPU counts only after three readings in a row over its limit, so one busy second is no alert.

Tell Discord, Slack or any webhook

Set rules such as CPU above 90 % for 5 minutes or fullest disk above 95 %, and MSYS sends a message to a Discord channel, a Slack channel or your own https webhook. Each rule rests 30 minutes after it sends (you can change it), and at most 48 messages go out a day. The webhook address stays on this computer, is shown only in part, and AI apps can neither read nor add one.

Quick view

The computer at a glance, from the menu bar or the taskbar

Closing the window keeps MSYS running next to the clock (macOS menu bar, Windows taskbar, Linux top bar). Its menu shows CPU, memory, GPU, the hottest sensor, disk and network as bars that change every second. Quick view opens a small window: rings, graphs of the last minutes, a tile for every CPU core, and bars for memory, GPU and every disk, with Tab or 1–4 to switch and Esc to hide it. Open brings the full window back; Quit in the menu ends MSYS.

Settings

How often, what to show, what to keep, and who may use it

Pick how often MSYS reads the computer (every half second to every minute; it keeps the last hour in memory only), which parts the dashboard shows and in which view, how long the history log keeps rows, the webhook alert rules, and light or dark. Public releases install themselves while the window is put away; beta updates only when you tick Get beta updates. AI agents sets what AI apps may do.

Linux (Ubuntu 22.04 & 24.04) · macOS (Apple Silicon & Intel) · Windows 10 & 11