Privacy Policy

Lettamu – Understand your letters · Last updated: 8 November 2026

1. Controller

Chrizantus Nehring
Hauptstraße 65
74930 Ittlingen
Germany
Email: support@lettamu.app

2. Data Lettamu processes

• Letters: the photo or scan, the recognised text, and the explanation, tasks, deadline, amount and your reply draft.
• Settings: your chosen explanation language and – if you enter it – your name for signing replies.

Letters may contain sensitive information, for example about health or finances. You process this data yourself on your device; we never receive it.

3. Where data is processed and stored

• Text recognition runs entirely on your iPhone using Apple Vision.
• Explanations and reply drafts are created by Apple Intelligence (Apple Foundation Models) on your device, without connecting to a server.
• Storage is local to the app on your iPhone. Lettamu does not sync letters over the internet.

4. Camera, photos, calendar and notifications

Lettamu uses the camera only when you scan a letter. With “Choose from Photos” it only sees the images you select. If you add a deadline to your calendar, you create the event yourself; it is handled like your other calendar entries (for example synced via iCloud or another calendar service you use). Reminders are local notifications scheduled by your iPhone.

5. Sharing and replies

If you share an explanation or a reply draft (e.g. by email or messenger), you decide who receives it. Lettamu sends nothing automatically.

6. App Store and beta testing (Apple)

Downloads and updates are handled by Apple (Apple Distribution International Ltd., Ireland) under Apple’s Privacy Policy. If you join the beta via TestFlight, Apple provides us with crash reports, technical device data and any feedback you choose to send. The content of your letters is not included.

7. Contact by email

If you write to support@lettamu.app, we use your message only to reply and fix issues (Art. 6(1)(f) GDPR). Please do not send us letters or notices unless necessary. You can ask us to delete your email at any time.

8. This website

lettamu.app is hosted on GitHub Pages (GitHub Inc., USA). GitHub processes technically necessary data such as your IP address to deliver the site and protect it from abuse (Art. 6(1)(f) GDPR). GitHub is certified under the EU-U.S. Data Privacy Framework. This website sets no cookies and uses no analytics.

9. What Lettamu does not do

No ads, no tracking, no analytics, no selling or sharing of data, no user account, no uploading of your letters.

10. Your rights

You have the right of access (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18), data portability (Art. 20) and objection (Art. 21). Since your letters are stored only on your device, you can delete them there at any time – individually in the app or completely by removing the app. You may also lodge a complaint with a data protection supervisory authority.

11. Changes

We update this policy when the app or the law changes. The version published here applies.