As of version 3.0.0, MindDeck no longer uses any AI service, has no subscription or in-app purchases, and does not sync to the cloud. This policy describes how the current version handles your data.
1. Information We Collect
All journal entries, survey responses, custom toolkits, wellness tools, mood tracking, and app preferences are stored exclusively on your device using secure local storage. There is no MindDeck account and no server holding your wellness data.
MindDeck is free. There are no in-app purchases, no subscriptions, and no receipts to verify. Recommendations, insights, and mood analysis are produced by scoring that runs on your phone — no prompt, entry, or mood value is sent to any AI provider.
If you consent, anonymous usage events are sent to Firebase Analytics. These describe how features are used and include your numeric mood rating so we can understand which tools help. They never include journal text, survey answers, or anything you have written. In the EU and UK this stays off unless you opt in; elsewhere you can turn it off at any time in Settings → Data & Privacy.
Crash diagnostics are sent to Firebase Crashlytics so we can fix faults. Sensitive fields — journal content, mood values, survey responses — are stripped before anything is transmitted.
2. How We Use Information
- Personalized Recommendations: Your survey answers, mood history, and which tools have worked for you are scored on your device to suggest what to try next. This never leaves your phone.
- Progress Tracking: Journal entries and mood logs build your personal history and milestones, stored locally.
- Crisis Resources: Emergency contacts and crisis tools are always available, unconditionally.
- Data Export: You can export your complete wellness history in JSON, CSV, or PDF at any time, free.
3. Information Sharing & Third Parties
We Do NOT Share Your Data With:
- Marketing companies or data brokers
- Social media platforms
- Any advertising networks — MindDeck contains no ads
- Health insurance providers
- AI providers — there is no AI service in the app
- Government agencies without legal requirement
Third-Party Services We Work With:
- Firebase Analytics: Optional and consent-based. Anonymous usage events only, as described above.
- Firebase Crashlytics: Crash diagnostics, with sensitive fields stripped before transmission.
- Firebase Cloud Messaging: Optional wellness reminder notifications.
- Google Play: Distributes the app. Because MindDeck is free with no in-app products, Google receives no purchase information about you from us.
- Your Device: Local sharing services (mail, messaging, files) when you choose to export your own data.
Previously used and now removed: xAI (Grok), Supabase, Firebase Authentication, Firebase Remote Config, and Firestore cloud sync. If you used MindDeck before version 3.0.0 and had custom toolkits stored in the cloud, the app performs a one-time migration that copies them to your device and then deletes the remote copies. After that migration runs, no MindDeck data remains on any server.
4. Data Security & Controls
Your Control Over Data:
- Local Device Storage: All personal data stays on your device — delete the app to remove everything.
- Optional Analytics: Entirely opt-in, and declinable outright.
- Data Export: Free for everyone, in JSON, CSV, and PDF.
- Right to Delete: Uninstalling MindDeck permanently removes all your data. Because there is no cloud copy, there is nothing left behind to request deletion of.
Security Measures:
- Offline-First Architecture: Every feature works with no network connection. Your wellness data has nowhere to go.
- AES-256 Encryption: Sensitive wellness data — survey responses, mood history, and battle entries — is encrypted at rest.
- Secure Key Storage: Encryption keys are held in platform secure storage (iOS Keychain / Android Keystore).
- Zero-Knowledge Architecture: Encryption happens on your device. We never hold your keys, and cannot read your data.
- Encrypted Communication: The optional analytics and crash traffic described above uses HTTPS.
5. Children’s Privacy
MindDeck is intended for adults, 18 years and older. On Google Play the app is configured to restrict users determined to be minors from finding or downloading it, and we do not knowingly collect information from anyone under 18. Mental health is serious; younger users should involve a parent, guardian, or a qualified professional. Where an app store provides an age category signal, we honour it, use it only to comply with the applicable law, and do not retain it.
6. Changes to This Policy
We may update this privacy policy occasionally to reflect changes in our practices or for legal requirements. Users will be notified of significant changes through the app. Continued use after changes indicates acceptance of the updated policy.
Contact Us
Questions about this privacy policy? We're here to help:
Your privacy is our priority. MindDeck is built to protect you.