21 Days — Privacy Policy

Last updated: June 2026

Data we collect

No account or sign-in is required. The only data stored is what you create inside the app: habit names, descriptions, emojis, categories, and daily check-ins (done / rest / missed) within each 21-day challenge.

Storage

All data is stored on your device only. Nothing is sent to a server.

Data retention

Data is kept on your device until you reset or uninstall the app. Tapping Settings > Reset app deletes all local data immediately.

Sharing with third parties

We do not sell, trade, or transfer your personal data to third parties. Services we use: RevenueCat (Premium subscription management and in-app purchases via App Store / Google Play).

Sharing

Success share cards are created on your device only. Images are not uploaded to our servers automatically.

Notifications

The app uses on-device notifications for morning and evening check-in reminders. You can turn them off in system settings.

Your rights (GDPR / PDPA)

You can erase all your data from Settings > Reset app. Deletion is permanent and cannot be undone.

Contact

For privacy questions, contact [email protected]

Support · Apple Standard EULA (iOS) · Google Play Terms (Android)