Data Usage
Effective date: July 4, 2026
What we store, where, and for how long
This table covers every category of data Habit AI handles. "If signed in" matters throughout: without an account, nothing in the first six rows ever leaves your device. For the full context, read the Privacy Policy.
| Data category | Purpose | Where stored | Retention |
|---|---|---|---|
| Habits (name, category, color, icon, target, frequency, reminder times) | Core habit tracking and reminders | On device (SwiftData); synced to Google Firebase Realtime Database if you are signed in | Until you delete the habit, the app, or your account (cloud copy) |
| Daily entries (completion, logged values, notes, optional mood) | Progress history, streaks, charts, and insights | On device; synced to Firebase if signed in | Until you delete the entry, the app, or your account |
| Body measurements (weight, tape measurements, wellness and adherence scores, notes) | Body tab trends and check-in history | On device; synced to Firebase if signed in | Until you delete the check-in, the app, or your account |
| Account profile (display name, email, provider photo) | Identifying your account and cloud backup | Firebase Authentication and Firebase Realtime Database | Until you delete your account |
| App settings (theme, weight unit, notification preference, onboarding state) | Remembering your preferences across devices | On device; synced to Firebase if signed in | Until you delete the app or your account |
| Subscription and trial record (plan, purchase/expiry dates, trial start) | Unlocking your purchase on all your devices | On device (cache) and Firebase if signed in; Apple keeps the underlying purchase records | Until account deletion; Apple retains purchase history under Apple's policies |
| Apple Health data (steps, active energy, sleep, water, mindful minutes — read-only, optional) | Auto-completing matching habits | Read on device only; raw samples are never uploaded and are excluded from CSV export | Not stored by us; access is controlled in the iOS Health app |
| AI inputs and outputs (stats summaries, habit text you type, activity-log summaries) | AI coach, natural-language habit creation, log summaries | Processed entirely on device by Apple Intelligence; never transmitted to any server | Nothing is retained outside your device |
| Analytics events (habit completed/logged incl. habit name and category, screen views, rating-prompt events) | Understanding usage to improve the app | Google Firebase Analytics (Google servers) | Per Google's data retention policies |
| Crash diagnostics (device and crash data) | Finding and fixing crashes | Google Firebase Crashlytics (Google servers) | Per Google's data retention policies |
| Widget snapshot (today's habits, streak, progress) | Home-screen widget display | On device only, in the app's shared App Group container; refreshed by the app | Replaced on each update; removed when the app is deleted |
| CSV exports | Your personal copy of your data, created only when you tap Export | Wherever you choose to save or share the file | Entirely under your control |
Deleting everything
The in-app deletion flow (Settings → Account & Sync → Delete Account) removes your cloud data, your account, and all local data in one step. Steps and details are on the Account Deletion page.