Last updated 1 October 2026
App privacy policy
This policy covers the Margen app for Android and the service behind it, which turns your handwriting into text and lets you read it from Claude. The website and its waitlist have their own policy.
Questions or requests: hello@getmargen.app.
The short version
- Your notes are written and kept on your tablet. The app sends pages to our service to transcribe them and to back them up, so you can search them, read them from Claude and get them back after a reinstall.
- Your account is your email address. We don't ask for your name.
- No ads, no analytics, no tracking. We don't sell your data or use it to train AI models.
- You can delete a page, or your whole account and everything stored with it, from the app.
What the app sends, and why
| Data | Why | Legal basis (GDPR) |
|---|---|---|
| Your email address | Your account: we email you a six-digit code to sign in, and to confirm that you want your account deleted | Contract, art. 6(1)(b) |
| Images of your handwritten pages | Transcription: a vision model reads them and returns the text, a short title and a one-line summary. The images are also kept so Claude can look at a page when the text isn't enough | Contract, art. 6(1)(b) |
| The text, title and summary of each page | Search, and reading your notes from Claude once you connect it | Contract, art. 6(1)(b) |
| Your ink (the strokes of each page, compressed) | Backup, so your notes come back after a reinstall or on a new tablet | Contract, art. 6(1)(b) |
| The tablet's maker and model, and its Android device identifier | An account is tied to one tablet, and each tablet gets the free starting credits once. We store only a keyed hash of the identifier, never the identifier itself | Legitimate interest, art. 6(1)(f): preventing abuse of free credits |
| Your credit balance and its history (one entry per transcribed page) | Counting AI usage against your credits | Contract, art. 6(1)(b) |
| IP address and request details | Running the service, rate limits and abuse protection. Kept in short-lived operational logs | Legitimate interest, art. 6(1)(f) |
Pages are sent in the background when you have a connection. A page is transcribed again only when its ink changes.
Connecting Claude
If you connect Claude, you sign in with your email and approve the connection. Claude can then read the text, titles, summaries and page images of your notes, and nothing from any other account. It can't change or delete anything. What Claude does with what it reads is covered by Anthropic's privacy policy. You can disconnect Claude from the app's settings at any time.
Who processes it for us
- Cloudflare runs our service and stores your account, your notes' text, page images and ink backups (Workers, D1, R2), and routes model calls (AI Gateway, with request logging turned off).
- OpenRouter passes each page's images to the vision model that transcribes them. We only allow model providers that don't store or train on the data they receive.
- Resend sends the sign-in and confirmation emails.
- Google Play handles the purchase. We never see your payment details.
These companies may process data outside the European Economic Area. Where they do, the transfer is covered by the EU–US Data Privacy Framework or the European Commission's standard contractual clauses.
How long we keep it
- Your notes' text, images and ink backups: until you delete the page in the app or delete your account.
- Your account, email and credit history: until you delete your account.
- Sign-in codes: until they're used, or for 10 minutes at most.
- Operational logs: a few days.
- After an account is deleted, we keep only the keyed hash of the tablet's identifier and the date it received free credits, so the same tablet doesn't get them twice. Nothing in it identifies you.
Deleting your data
- One page: delete it in the app. It's removed from our service at the next sync.
- Your whole account: in the app, open Settings → Delete account and confirm with the code we email you. Your account, notes' text, images, ink backups, credits and Claude connection are deleted straight away.
- Without the app: email hello@getmargen.app from your account's address and ask us to delete your account. We'll confirm and delete everything listed above within 30 days.
The notes on your tablet stay on your tablet until you delete them or uninstall the app.
Your rights
You can ask us to show you, correct, export or delete your data, or to stop using it. Write to hello@getmargen.app; we answer within one month. If you think we've handled your data wrongly, you can complain to a data protection authority, in Spain the Agencia Española de Protección de Datos.
Children
Margen is not meant for children under 16, and we don't knowingly collect their data.
Changes
If we change this policy, we'll update the date at the top. If a change affects how we use data you've already given us, we'll tell you in the app or by email first.