Fasen has no account and no server of ours. What you record stays on your device, and reaches your own iCloud only if you turn sync on. This policy covers the iPhone app and this website.
In short
- No sign-in. We never learn your name, email address or phone number.
- Your entries live on your device; with sync on, a copy goes to your own iCloud, encrypted on the device first.
- Apple Health is optional, and nothing the app reads from it leaves your device.
- Diagnostic reports go to the services named below; none of them carries anything you record.
- No advertising, no tracking, nothing sold or shared for advertising.
What the app keeps on your device
Everything you enter belongs to the device: your profile, where every field is optional; your settings; and every entry you record, including any text you write into it. The app also keeps your diagnostics choice, the values of its feature switches, and a random identifier it generates on first launch.
That identifier is not a hardware or advertising identifier. Reinstalling the app creates a new one, and it exists only so the app can tell which of your devices wrote a given entry.
The copy on your device is the original. Deleting the app removes it.
Apple Health
Only if you connect it, from onboarding or Settings. Every permission is Apple's own sheet, and you can withdraw any of them in the Health app.
- Read: weight, water, mood, sleep, steps, active energy, resting energy, exercise minutes.
- Written back: weight, water, mood — only values you log in this app, marked so the app recognises its own entries.
- Never written: fasting sessions.
Readings the app imports from Apple Health stay on the device. They are not sent to iCloud, to us, or to Google — crash reports cannot carry them, because the app has no way to attach its own data to a report.
Sync to your own iCloud
Sync needs three things at once: the paid Cloud sync feature, an iCloud account on the device, and iCloud switched on for the app in iOS Settings. There is no separate switch inside the app.
Your entries go to your own iCloud private database, in your own storage. We have no access to it, and nothing reaches a server of ours. Every field of every record is encrypted on the device before it is uploaded, with keys held in your iCloud Keychain. Apple's documentation states that with Advanced Data Protection turned on, those keys are available only to you.
What syncs, by record type: fast, saved plan, weight entry, water entry, mood entry, challenge. Each record carries its own fields — dates, values, time zones and any text you typed into it — along with the bookkeeping the app needs to reconcile your devices: which install wrote it, whether it went to Apple Health, and a version counter.
What never syncs: your profile, your settings, and anything read from Apple Health.
Removing the app's iCloud data in iOS Settings leaves the copy on your device untouched. If you later edit that data, the app may upload it again.
Crash reports and feature switches
The app sends diagnostics to the services below. None of them ever receives your entries, your profile, or anything from Apple Health.
| Service | What it is for | What it sends | Can you turn it off? |
|---|---|---|---|
| Google Firebase Crashlytics | crash reporting | crash data, diagnostic data | Yes — Settings → Diagnostics |
| Google Firebase Sessions | session diagnostics | diagnostic data | Yes — Settings → Diagnostics |
| Google Firebase Remote Config | feature configuration, SDK usage analysis | diagnostic data | No |
Crash reports carry the stack trace, your device model, the iOS and app version, and the identifiers the service uses to group reports. Feature switches send your device's country, language, time zone and operating system version so the app knows which features to show. As with any network request, these services see your device's IP address.
Google states that it starts removing crash traces and their identifiers after 90 days. Google publishes no retention period for Google Firebase Sessions. Google states that it keeps installation identifiers until they are deleted through its API, and removes them within 180 days after that.
Processing happens in the United States, under the EU–U.S. Data Privacy Framework.
Google's privacy information is at firebase.google.com.
Turning crash reports off stops both the reports and the session events that accompany them. It does not delete what was sent before, and we have no way today to find or delete data held under an installation identifier — there is no account to look it up by.
Feature switches cannot be turned off; the app needs them to decide what to show.
What the app declares to Apple
Crash Data — used for app functionality, not linked to your identity, not used for tracking. Diagnostic Data — used for app functionality and analytics, not linked to your identity, not used for tracking.
Purchases and notifications
Purchases go through the App Store, and the app checks what you are entitled to on the device. No purchase information reaches us. The app registers for notifications only so iCloud can wake it to sync; that registration is with Apple. Reminders are scheduled on the device itself.
This website
The server that serves these pages keeps a log entry for each request: the time, your IP address and port, the method, host, path and query, the protocol and connection details, the request headers your browser sends — which include the browser itself, the page you came from, and your preferred languages — and the response status, size and duration. Those entries are kept for about 32 days and are used to keep the site running and secure.
These pages set no cookies and run no scripts.
Your choices
| What you want | How |
|---|---|
| Remove one entry | Delete it in the app |
| Remove everything on the device | Delete the app |
| Remove the iCloud copy | iOS Settings → your Apple Account → iCloud → manage storage → this app |
| Stop syncing | Turn iCloud off for the app in iOS Settings |
| Remove what the app wrote to Apple Health | Settings → Apple Health in the app, or the Health app |
| Stop crash reports | Settings → Diagnostics in the app |
Changes
A new version of this policy is published on this page with a new effective date.