Last updated: October 15, 2026
Glacir: Stretch & Mobility ("the app") is a stretching app for iPhone, published by Lars Haneveld. Glacir is built so that your data stays with you.
The short version
- No account. You never sign up or log in.
- No server. We do not run a backend and never receive the data you put into the app.
- No tracking, no ads, no analytics. The app contains no analytics, advertising or crash-reporting software, does not track you across apps or websites, and shares nothing with third parties.
Who is responsible
Lars Haneveld, Elbinger Straße 15, 60487 Frankfurt am Main, Germany.
Email: [email protected]
What the app stores, and where
On your iPhone. The app keeps:
- your answers from setup: the name you enter (if any), goals, focus areas, level and time preference;
- your session history: date, routine, duration, time spent on each side, your answer to "How did that feel?", any stretch you marked as pinching, and the average and peak heart rate if a heart-rate sensor was connected (these two stay on this iPhone only);
- your custom routines, programme progress, body-map check-ins and app settings;
- the identifier of a heart-rate sensor you connected, so the app can reconnect to it.
In your own iCloud. If you are signed in to iCloud, the app mirrors your session history (without heart rate), custom routines, profile, programme progress and body-map check-ins to the private iCloud key-value storage of your Apple Account, so they appear on your other devices and come back after a reinstall. This storage belongs to your Apple Account and is run by Apple under Apple's Privacy Policy. We cannot access it.
We, the developer, receive none of this data.
Apple Health
Health access is optional. The app asks for it only when you turn on "Save to Apple Health" (on a routine's finish screen or in the app's Settings). With your permission, Glacir:
- writes each completed routine as a Flexibility workout with estimated active energy, and wind-down routines as Mindful Minutes;