Tethr — Privacy Policy

Last updated: 6 July 2026

Tethr is a focus app for two people who block distracting apps together and unlock them by physically tapping their phones. It is built to know as little about you as possible.

What we store

• A display name you choose at setup — no email address, no phone number, no real-name account.
• Your pairing — which two anonymous accounts form a pair.
• Lock session state and events — timestamps of lock, unlock, break-lock and related events, kept so your partner can see the shared state. Event history is deleted automatically after 90 days.
• A push token (Google Firebase) used only to wake the app for state updates.
• The package names of apps you choose to block. We never read your app usage beyond detecting the foreground app on your own device — that check happens on the phone and is not sent to us.

We collect no location, no contacts, no messages, no browsing data. There are no ads and no third-party analytics or tracking SDKs.

Where it lives

Data is stored in the EU (Germany), on systems we operate ourselves. Traffic passes through Cloudflare (EU/global CDN) for transport security.

Legal basis & your rights (GDPR)

Processing is based on your consent, given when you set Tethr up. You can withdraw it at any time by deleting your account — see account deletion. You have the right to access, correct, or erase your data, and to complain to the Irish Data Protection Commission (dataprotection.ie).

Retention

Event history: 90 days, purged automatically. Account data: kept until you delete your account, then erased (see below). Expired co-presence nonces are housekept continuously.

Children

Tethr is not directed at children and is intended for users 16 and over.

Contact

Data controller: the Tethr developer, Ireland — hello@usetethr.app.

Changes

If this policy changes, the date above changes with it; material changes will be announced in the app.