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Privacy policy — Zirq

Version 7 · 2026-08-06

This policy covers Zirq, the fasting app (com.southcove.fasting). The short version: your data is yours. It lives on your device, optionally backed up to your own cloud account. We run no servers, and we never see, collect, or share anything.

What the app stores

• Fasting history — start and end times of your fasts, the goal and eating-window length for each.
• Progress photos — only if you add them: photos you take or import to track your progress over time, with the date you assign and an optional angle tag (front/side/back). On iOS the app can also analyze a photo entirely on your device to power the comparison views: it derives a body outline (silhouette) image and, alongside it, derived body geometry — where the body sits in the frame, the positions of shoulder and hip landmarks, and a body-width profile — stored in the app's local database, along with any anchor-point corrections you make to a photo's comparison. Outlines and this derived geometry are stored beside the photos and follow exactly the same rules.
• Body weight — only if you log it: weight entries with their measurement time. If you connect Apple Health or Health Connect (optional, off until you turn it on), the app also keeps an on-device copy of weight entries imported from there.
• Waist circumference — only if you log it: waist measurements with their measurement time. If you connect Apple Health (optional, off until you turn it on), the app also keeps an on-device copy of waist measurements imported from there. (Health Connect on Android has no waist measurement type, so no waist data is exchanged there.)
• Your name — only if you enter one, used to personalize greetings and reminders.
• Settings — your fasting schedule, notification preferences, and appearance choice.
• A random device identifier — used only to label sync snapshots; it identifies a device, not you.

All of it is stored in a local database on your device; progress photos are stored as image files in the app's private storage.

Where it goes

Nowhere, by default. The app has no analytics, no ads, no tracking, no crash reporting, and no server of ours to send anything to.

If you connect Backup & sync (optional, off until you turn it on):

• On iOS, your data is stored in the app's private iCloud (CloudKit) database, tied to your Apple ID. We cannot read it — Apple's design makes the private database inaccessible to anyone but you.
• On Android, your data is stored as a hidden app-data file in your Google Drive, tied to your Google account. The app can only see its own file, and we have no access to your account. Your Google account email is shown in Settings so you can see which account is connected; it never leaves the device.

On Android, the operating system may also include the app's local database in Android Auto Backup to your Google account, so your history survives reinstalling. This is standard Android behavior under your Google account's control.

If you connect Apple Health / Health Connect (optional, off until you turn it on; weight and waist each have their own switch and their own Health permission):

• Weight entries you log in the app are written to Apple Health (iOS) or Health Connect (Android) on your device, under those platforms' own privacy controls. Waist measurements you log are written to Apple Health on iOS; Health Connect has no waist measurement type, so waist is never exchanged on Android.
• Weight entries and waist measurements recorded by other apps or devices are read from there and shown in the app; a copy stays in the app's local database so your chart works offline.
• Weight entries and waist measurements you logged in the app are included in Backup & sync (if you use it). Entries imported from Apple Health / Health Connect are never uploaded by the app — each device re-reads them from its own Health store.

Progress photos are never uploaded by the app. They are not part of Backup & sync, and on Android they are explicitly excluded from Auto Backup. The same applies to the outline images derived from them. Like everything the app stores, they can be included in your device's own full-device backup (e.g. an iCloud or computer backup of the whole phone), which the operating system performs under your control.

Notifications are local: scheduled on the device, never sent through a push server.

Deleting your data

• Cloud backup: Settings → Backup & sync → Delete backup removes the snapshot from your iCloud / Google Drive and turns sync off.
• Progress photos: open a photo and delete it — the image file, and any outline image derived from it, is removed from the device immediately. Photos exist nowhere else.
• Your name: Settings → Profile → clear the name field.
• Body weight: delete entries from the weight screen. Disconnecting Apple Health / Health Connect removes every imported entry from the app immediately. Entries the app wrote to Apple Health / Health Connect are deleted there when you delete them in the app; after disconnecting, manage them in the Health app itself.
• Waist circumference: delete measurements from the waist screen. Disconnecting Apple Health removes every imported measurement from the app immediately; the same rules as for weight apply.
• Everything on the device: uninstall the app. (On Android, also delete the app's backup data via your Google account's backup settings if you don't want Auto Backup to restore it.)

What we'd need to change this policy for

Adding any analytics, crash reporting, or server of our own would change the answers above. If that ever happens, this policy's version number will be bumped and the app will show you what changed before anything new leaves your device.

Contact

Questions or requests: email southcove.software@gmail.com.

Changelog