MareArts ANPR — FAQ & Policy

Last updated: 10 August 2026

Licences and billing

What types of licences are available?

Licences come in three durations:

  • Monthly — renewable monthly
  • Yearly — renewable annually
  • Lifetime — no expiry, use indefinitely

All licences include multi-region support (Korea, Europe+, North America, China, Universal) and the latest model updates.

How does renewal work?

  • Monthly and yearly licences must be renewed before they expire. We send new keys ahead of expiry so you have time to update without interruption, and every licence carries roughly ten extra days as a buffer.
  • Lifetime licences never expire and need no renewal.

When will I receive my renewal key?

Before your current licence expires, so you always have time to update without a gap in service.

What is your refund policy?

  • Before your serial key is sent: full refund on request.
  • After your serial key is sent: we cannot process a refund.
  • Why: serial keys work entirely offline and cannot be deactivated remotely once issued, so access cannot be revoked after delivery.

If you are unsure whether the software fits your case, test it first — see below. We would rather you evaluate it for free than buy a licence you cannot use.

What happens if MareArts discontinues the service?

We will either open-source the code or issue lifetime licences to all active users, so you keep access to the software you paid for.

How can I cancel?

Subscriptions are billed through PayPal and can be cancelled at any time from your PayPal account.

Trying before you buy

Can I test before purchasing?

Yes, and we recommend it:

  • Use the free test API to evaluate the SDK.
  • Try the live test website to see recognition in action.
  • Use the mobile app with 100 free scans per day, no licence required.

Regions

Which regions are supported?

Both the SDK and the mobile app support:

  • Korea (kor / kr)
  • Europe+ (euplus / eup) — EU countries plus others
  • North America (na) — USA and Canada
  • China (china / cn)
  • Universal (univ) — all regions

Do I need to specify a region?

It is optional and defaults to univ, but a specific region gives noticeably better accuracy. Use univ only when the region is genuinely unknown or mixed.

SDK

Do I need an internet connection?

No. The SDK runs fully offline once set up. Internet is needed only for the initial model download and for model updates; without it the SDK keeps using the model you already have.

Can I use one SDK licence on several computers?

Yes. SDK licences have no limit on the number of computers and can be used on many machines at once.

What does an SDK licence include?

  • Every released detector and OCR model, including the current v16 models
  • CPU, CUDA and DirectML backends
  • All regions (kor, euplus, na, china, univ)
  • Unlimited computers
  • Model updates as they are released

Which model version should I use?

Model line-up and accuracy comparisons change with each release, so they live with the code rather than here. See the MareArts ANPR repository and the package page for the current models and how to select one.

Can I change region without creating a new instance?

Yes. set_region() switches region on an existing OCR instance, which keeps memory down — roughly 180 MB for one instance instead of about 540 MB for three:

from marearts_anpr import ma_anpr_ocr

ocr = ma_anpr_ocr("large_fp32", "kor", user, key, sig, version='v16')

ocr.set_region('euplus')   # or 'eup'
ocr.set_region('na')
ocr.set_region('china')    # or 'cn'
ocr.set_region('kor')      # or 'kr'

Use set_region() when you process regions one after another or memory is tight. Use separate instances when you process regions concurrently in different threads — set_region() is not thread-safe.

Mobile app

How many devices can one licence cover?

One licence covers one device. This differs from the SDK, which allows unlimited computers.

Can I move my licence to a new device?

Yes — sign in on the new device and sync your data from the cloud. Frequent device changes are best avoided, for sync reliability.

Is there a free trial?

Yes. The app gives 100 free scans per day without a licence, which is enough to judge detection quality before buying.

Does the app work offline?

Partly. All AI detection runs on the device, so plate recognition works without internet. Cloud sync, webhook delivery and a few other conveniences need a connection.

What is cloud sync?

It keeps your rules and detection records in step across sessions. Cloud sync is available to licensed users.

What is the Cloud Scan API?

It sends images for plate detection through the cloud. It is open to everyone, free and licensed, with a shared limit of 1,000 calls per day across all users.

Which webhooks are supported?

  • Discord — detection results posted to a channel
  • Custom server — your own receiver (example code)

More integrations, Slack among them, are planned.

Which platforms are supported?

iOS and Android.

Where do I download the app?

Search for “marearts anpr” in the App Store or Google Play, or go straight there:

Download on the App Store Get it on Google Play

Read the full mobile app guide →

Desktop viewer

Is there a desktop app?

Yes. MareArts ANPR Desktop views, searches and maps the detections from your mobile app on your own computer. It is included with your licence at no extra cost, and your data stays on your machine.

Support

Something is not working, or I have a question about my licence

Email hello@marearts.com and we will help with setup, licensing or anything technical.