Privacy Policy

Period Tracker Offline · Xinling Studio · Last updated: May 6, 2026

    Summary: Period Tracker Offline stores all your data locally on your device.
    We do not collect, transmit, or share any personal information. No account is required.
  

1. Who We Are

Period Tracker Offline is developed and published by Xinling Studio. If you have any questions about this policy, contact us at xinlingforever99@gmail.com.

2. Data We Collect

We collect no personal data.

All information you enter in the app — period records, daily logs, symptoms, mood, notes, and settings — is stored exclusively in local storage on your device. This data never leaves your device and is never transmitted to any server, cloud service, or third party by us.

3. Data Storage and Security

Your data is stored in a local database on your Android device using Isar, an on-device embedded database. The data is protected by your device's standard security model (file system permissions). We recommend keeping your device updated and using device-level encryption for maximum security.

You can export a full backup of your data at any time from the app's Settings screen and store it wherever you choose.

4. Data We Do Not Collect

We do not collect, process, or store:

Names, email addresses, or any account information
Location data
Device identifiers or advertising IDs
Usage analytics or crash reports
Health or biometric data beyond what you type into the app locally
Payment information of any kind

5. In-App Purchases

The app offers an optional one-time Pro upgrade purchased through Google Play Billing. All payment processing is handled entirely by Google. We do not receive, store, or process your payment details. Please refer to Google's Privacy Policy for information on how Google handles payment data.

6. Advertising

This app contains no advertisements and integrates no advertising SDKs. We will never introduce advertising that requires collecting or sharing user data.

7. Third-Party Services

The app does not integrate any third-party analytics, crash reporting, or tracking SDKs. The only network interaction is with Google Play Billing when you choose to purchase the Pro upgrade.

8. Permissions

The app may request the following Android permissions:

POST_NOTIFICATIONS — to deliver local period and fertile window reminders. Notifications are generated on-device and contain no personal data.
USE_BIOMETRIC / USE_FINGERPRINT — to unlock the app with your fingerprint if you enable the biometric lock feature. Biometric data is handled entirely by the Android system and is never accessible to the app.
SCHEDULE_EXACT_ALARM — to schedule reminders at precise times on Android 12 and later.

No permission is used to collect or transmit data.

9. Children's Privacy

This app is not directed at children under the age of 13. We do not knowingly collect any information from children. Because we collect no data at all, there is no risk of inadvertent collection from any age group.

10. Changes to This Policy

We may update this privacy policy from time to time. Any changes will be posted on this page with an updated "Last updated" date. Continued use of the app after changes are posted constitutes acceptance of the revised policy.

11. Contact

If you have questions or concerns about this privacy policy, please contact us:
xinlingforever99@gmail.com