Privacy Policy
Just Fast is an intermittent fasting timer made by Remotion (contact: apps@remotion.pl). This policy explains what the app keeps on your phone, what it sends to our service providers, how long data is kept, and how you can delete it.
1. Data that stays on your device
Your fasts (start and end times, plan, how you felt), weight entries, water entries, reminders and settings are stored on your device. The app works fully offline and without an account. This data leaves your device only in the cases described below.
Apple Health and Health Connect. If you connect them, Just Fast reads your weight and steps. Steps stay on your device. Weight readings are added to your weight log, so they are included in the cloud backup if you turn it on (section 2). Health data is never used for advertising, never sold and never shared with advertisers.
2. Data we process on servers
Anonymous app ID
The app creates a random, anonymous Firebase ID for your installation. It does not contain your name or email. We use it to link your feedback and your purchases to your installation.
Optional account (Google or Apple sign-in)
If you sign in, Firebase Authentication stores your email address and name as provided by Google or Apple, linked to your app ID.
Optional cloud backup (Just Fast Plus, signed in)
If you have Plus and sign in, the app backs up your fasts, weight and water entries to Google Cloud Firestore, so you can restore them on another phone. Nothing is backed up unless you sign in.
Feedback you send
When you send feedback from the app, we receive your message, the reply email if you enter one, the app version, platform, language, your current plan, whether you have Plus, and your anonymous app ID.
Purchases
Purchases are handled by the App Store or Google Play. RevenueCat receives your anonymous app ID and your purchase history to unlock Plus and restore purchases. We never see your payment details.
Analytics and crash reports
Firebase Analytics receives app usage events (for example, a fast started or a screen opened), app version, device type, operating system, language and country, with a random app-instance identifier. Firebase Crashlytics receives technical crash reports. Neither includes your fasting times, weight or feedback text.
Ads (free version only)
The free version shows small banner ads from Google AdMob. AdMob may process your device's advertising identifier, IP address (approximate location), ad interactions and diagnostics. In the EU/EEA and UK we ask for your consent first; on iOS, ads are personalised only if you allow tracking. Plus subscribers see no ads, and AdMob receives no data from them.
3. Service providers
- Google Firebase (Authentication, Cloud Firestore, Analytics, Crashlytics) – Google LLC. Firebase privacy.
- Google AdMob – Google LLC. How Google uses data in ads.
- RevenueCat – RevenueCat, Inc. RevenueCat privacy.
- Apple App Store and Google Play – purchases, downloads and ratings, under their own policies.
All data sent from the app is encrypted in transit (HTTPS/TLS). We do not sell your data.
4. How long we keep data
| Data | How long it is kept |
|---|---|
| Fasts, weight, water and settings on your device | Until you delete them in the app, use Delete all data, or uninstall the app. |
| Account (email, name) and cloud backup | Until you delete your account or ask us to delete it. They are then deleted immediately from our live systems; Google's backups clear within 30 days. |
| Anonymous app ID | As long as you use the app, and until you ask us to delete it. |
| Feedback | Up to 24 months after you send it, then deleted; sooner if you ask. |
| Purchase records (RevenueCat) | As long as you have a purchase or subscription, and afterwards as long as tax and accounting law requires. |
| Analytics events (Firebase Analytics) | Up to 14 months, then deleted automatically. |
| Crash reports (Crashlytics) | Up to 90 days. |
| Ad data (AdMob) | According to Google's ad data retention policy. |
5. How to delete your data
In the app: open Settings › Delete all data and confirm. This deletes all data on your device and, if you are signed in, your account and your cloud backup. You can also delete only your account in Settings › Account › Delete account and backup, or delete single fasts and weight entries.
Without the app: email apps@remotion.pl with the subject "Just Fast – delete my data". Tell us the email you signed in with. If you never signed in, send the request from the app through Settings › Send feedback instead: it carries your anonymous app ID, so we know which data is yours. We delete your account, cloud backup, feedback and the data linked to your app ID within 30 days and confirm by email.
Uninstalling the app removes all data stored on your device.
More details: Delete your Just Fast account and data.
6. Your rights (EU/EEA and UK)
Remotion is the controller of the data described above. We process it to provide the app and its features you choose (account, backup, purchases, feedback: performance of a contract), to keep the app reliable and improve it (crash reports and analytics: legitimate interest), and to show ads where you have consented. You can ask us for access, correction, deletion or a copy of your data, object to processing, or withdraw consent at any time, and you may complain to your data protection authority (in Poland: UODO).
7. Children
Just Fast is not intended for children under 16. We do not knowingly collect personal data from children. If you believe a child has used the app, contact us and we will delete the data.
8. Changes to this policy
We may update this policy. Changes are posted on this page with a new date.
Contact
Questions or requests about your data: apps@remotion.pl