Mark is a fully offline habit streak tracker. We do not collect, transmit, or store any personal data on external servers. Everything you create in Mark stays on your device.
We collect nothing. Specifically:
All app data — your streaks, notes, settings, and preferences — is stored locally on your device using Hive, an offline key-value database. This data never leaves your device.
Mark uses Android's WorkManager to schedule and deliver local notifications. This is a background process that runs entirely on your device.
Note for MIUI and heavily optimized Android devices: background processes may be affected by battery optimization settings. If notifications are unreliable, go to Settings, then Battery, select Mark, then No Restrictions.
Mark uses RevenueCat to manage in-app purchases (Mark Pro subscription and Mark Full lifetime). RevenueCat processes purchase transactions through Google Play. We do not handle payment data directly.
RevenueCat's privacy policy: revenuecat.com/privacy
Mark requests the following device permissions:
No location, camera, microphone, contacts, or storage permissions are requested.
We do not sell, share, rent, or transfer your data to any third party. There is no data to share — it never leaves your device.
To delete all Mark data, uninstall the app. All locally stored data is removed automatically by Android upon uninstallation.
Mark does not collect any data from any user, including children. The app is safe for all ages.
If this policy changes, the updated version will be posted at markyourday.app/privacy with a new effective date.
Questions about this policy: hello@markyourday.app