YuvixPrivacy Policy
1. Local-First Architecture
Yuvix is designed so that your menstrual cycle history, fertility observations (such as basal body temperature and LH test results), symptoms, mood, sleep recovery, movement records, and notes remain stored locally on your device. All health database records are encrypted using SQLCipher with a cryptographic key kept in the Android Keystore or the iOS Keychain (set to this device only on iOS). We do not verify that the key is stored in dedicated security hardware, so we do not claim it is.
2. No Cloud Health Database
Mentarich LLC does not operate a remote user account database or cloud health server for Yuvix V1. Mentarich LLC does not receive, view, sell, or monetize your local health history.
The encrypted health database is excluded from device backups and device transfers. Yuvix does not provide cloud backup or restore for your health history. Uninstalling the app, erasing or losing your device, or losing access to its device-bound encryption key can permanently erase access to your records. Restoring a device backup or a subscription does not restore those records. Exported health reports are separate documents and cannot be imported to restore the database.
3. Optional Android Health Connect Access
On Android, Yuvix can optionally read some data from Health Connect, the health data store built into Android 14 and later (and available from Google Play on older versions). This is off until you choose it. Yuvix does not ask for it at launch or during onboarding. It asks only after you open Settings > Connect health data and tap Connect health data on the Health data page, where Android then shows its own permission request.
- What Yuvix can read: exercise sessions (
READ_EXERCISE) and sleep sessions (READ_SLEEP). You can allow one, both, or neither. - Read-only: Yuvix never writes data to Health Connect. It does not read steps, heart rate, temperature, location, or other health data types, and it does not sync in the background.
- Exercise sessions: read only when you tap Import recent workouts, for up to the last 30 days. Yuvix keeps the exercise type, start and end time, a name for exercise types it cannot sort into its own categories, and an opaque Health Connect record ID used to avoid importing the same workout twice. It does not keep heart rate, calories, distance, routes, device, or source app. Imported workouts have no effort rating and do not earn World care points.
- Sleep sessions: read while the Move screen is open to show last night's sleep duration. Sleep data is not stored by Yuvix.
- Local only: imported workouts and record IDs are saved in the same encrypted on-device database as your other records. Yuvix has no server that receives this data, and it is not shared with RevenueCat, advertisers, or anyone else.
- Stop access: open Settings > Connect health data and tap Disconnect, or remove Yuvix under App permissions in the Android Health Connect app. Disconnecting keeps workouts you already imported.
- Delete imported data: tap Remove imported workouts on the Health data page to delete only the imported workouts. Your manually logged workouts stay. Delete All Local Data removes everything Yuvix stored, including imported workouts and record IDs, but does not change your Health Connect permissions. Disconnect separately as described above.
4. In-App Purchases and Subscriptions
If you choose to subscribe to Yuvix Premium, transactions are processed directly by the Apple App Store or Google Play Store. We use RevenueCat to validate digital subscription receipts and unlock premium entitlements.
When a RevenueCat key is configured in your version of the app, Yuvix contacts RevenueCat each time it launches or returns to the foreground, to load the available subscription offerings and your subscription status. This happens for every user, including people who never subscribe. RevenueCat receives an anonymous app user identifier, purchase and entitlement information, and technical information such as device type, operating system and last-seen time, along with standard network metadata. RevenueCat stores this data on servers in the United States and applies its own privacy policy and retention. Yuvix never transmits your cycle dates, symptoms, health reports, or personal health notes to RevenueCat or payment processors.
To have a RevenueCat customer record deleted, email support@yuvixapp.com. Deleting data inside the app does not delete it.
5. Advertising and Tracking
Yuvix V1 does not incorporate third-party advertising SDKs, data brokers, or behavioral ad tracking, and it has no third-party health tracking. We do not use your menstrual, fertility, or wellness records to build advertising profiles or deliver targeted advertisements.
6. Health Report Export
If you generate a Doctor-Ready Health Report PDF, the document is synthesized entirely on your device and saved as a temporary file in private app storage. Yuvix does not automatically upload or transmit your report. You maintain sole discretion over whether, when, and with whom you share this exported file via your operating system's native share sheet. The temporary file is deleted after you share the report or dismiss it. Anything you save or send elsewhere from the share sheet is outside Yuvix and is yours to manage.
7. Data Retention and Deletion
Your records remain locally on your device unless you delete them or lose access to them as described above. You can permanently erase all local records, database files, and encryption keys at any time directly within the app by going to Settings > Data & Privacy > Delete All Local Data. This removes the database, the encryption keys, and workouts imported from Health Connect. It does not clear Health Connect permissions (see section 3) and does not delete your RevenueCat customer record (see section 4).
8. Reminders and Notifications
Reminders are optional and off until you turn them on. They are local notifications scheduled on your device, and Yuvix may reschedule them after your device restarts. Reminder text is generic and does not include your health records. No reminder content is sent to a server.
9. Device Security and App Lock
Yuvix includes an optional biometric app lock feature (using Apple Face ID / Touch ID or Android Biometrics / Device Credentials). Platform security features and encryption help protect your records, but no system is guaranteed secure. We encourage users to keep their device operating systems updated and maintain a strong device passcode.
10. Medical Disclaimer
Yuvix provides wellness tracking, cycle insights, and general lifestyle recommendations. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any medical condition. Fertility window calculations are statistical estimates and must never be used as a method of contraception.
11. Contact Information
For questions or inquiries regarding this Privacy Policy or our data practices, please contact:
Mentarich LLC
Email: support@yuvixapp.com
Website: https://yuvixapp.com