Privacy Policy
Last updated: October 2, 2026
Food Symptom Detective ("the App", "we") is an offline-first food and symptom tracker. This policy explains what is stored, what leaves your device and why.
Key point: the food, symptom and wellness entries you create are stored on your device. We do not run servers that receive them, and we have no user accounts.
1. Data you enter
You can log the following in the App:
- Meals, foods and ingredients
- Symptoms, severity, timing and notes
- Wellness details such as stress, sleep, hydration, exercise, medication and menstrual cycle information
This may be sensitive health-related information. It is kept in the App's local database on your device and is not uploaded by us.
2. Where data is stored
- Local on-device storage only (SQLite), inside the App's sandbox.
- No sign-up or account is required, and we cannot see, recover or restore your entries.
- Uninstalling the App deletes its data. You can also delete entries or clear data inside the App.
- If you use the in-app export or report feature, the file is created on your device and goes only where you choose to share it.
3. Information collected by service providers
The App uses the following third-party services. None of them receives the content of your food, symptom or wellness entries. Only counts, levels and yes/no flags are sent, for example the number of symptoms logged, the highest severity level, and whether a wellness field was filled in.
- RevenueCat — manages subscriptions and purchase status. Purchases are processed by Apple's App Store or Google Play. RevenueCat receives an anonymous app user ID and purchase/subscription status. See revenuecat.com/privacy.
- Apple App Store / Google Play — process payments under their own terms and privacy policies. We never see your payment card details.
- Google Firebase Analytics and Crashlytics — provide anonymous usage statistics and crash reports (for example which screens or features are used, counts of items logged, meal type, severity level, purchase events, and technical device/app information such as OS version and crash traces). These services use a random app-instance identifier and do not receive your name or e-mail. In a small number of events a food name used in the elimination feature may be included. Firebase Analytics also derives an approximate location (country/region) from your IP address. See firebase.google.com/support/privacy.
We do not sell personal information. We do not use advertising SDKs and we do not use the advertising ID for advertising; the Android advertising-ID permission is declared only because the analytics library includes it, and it is used for analytics only.
4. Notifications
Reminders are scheduled locally on your device. You can switch them off in the App or in your device settings.
5. Not medical advice
Food Symptom Detective does not diagnose, treat or give medical advice. It shows patterns in the information you enter, which are not a medical conclusion. Talk to a qualified healthcare professional about symptoms, diet changes or medical decisions.
6. Security
Your entries rely on your device's protections (device encryption, passcode or biometrics, app sandboxing). Keep your device secured and backed up; we cannot restore data for you.
7. Children
The App is not directed to children under 13 and we do not knowingly collect their personal information.
8. Your rights
Because your entries stay on your device, you can access, edit, export and delete them in the App. For data handled by the services in section 3 (EEA/UK GDPR, California CCPA, Turkish KVKK No. 6698 or other laws) you may contact us to ask about, correct or delete the related information, and you may complain to your local data protection authority.
9. Changes
We may update this policy; the date above shows the latest version. Material changes will be reflected in the App or on this page.