Privacy Policy
Last updated: 9 September 2026
The short version. Baseline reads your Apple Health data on your iPhone and does its thinking there, including the AI. There is no account, no analytics, and nothing is ever sold or shared. Two things are worth stating plainly rather than glossing: Baseline writes back to Apple Health the things you log yourself, and looking up a food by name or barcode sends that query — and nothing else — to public nutrition databases.
This policy explains what Baseline ("the app", "we", "us") does and does not do with your information. It applies to the Baseline iPhone app and its Apple Watch app and widgets.
1. Health & fitness data
With your permission, Baseline reads data from Apple Health (HealthKit), which may include activity (steps, distance, energy, exercise), heart and vitals (heart rate, resting heart rate, HRV, respiratory rate, blood oxygen), sleep, body measurements, nutrition, mindfulness, and — if you enable it separately — Health Records such as lab results, conditions, medications, and clinical notes.
- What it writes. Baseline writes back only what you enter yourself: food and drinks you log, your body weight, and other measurements you record or correct in the app. It never invents an entry, and it never writes anything it merely inferred about you.
- What it deletes. If you ask it to remove a meal you logged, Baseline deletes that entry. Apple Health only permits an app to delete its own entries, so Baseline cannot touch anything written by another app or by you in the Health app.
- On-device processing. Your health data is processed entirely on your iPhone. It is never transmitted to us, because Baseline has no backend server and no account system.
- You choose what to share. You grant access per category in Apple's Health permission screen, and can change or revoke it at any time in Settings → Health → Data Access & Devices → Baseline, or Settings → Privacy & Security → Health.
2. The AI health coach
Baseline's "Ask Baseline" coach and daily read run on-device using Apple's built-in intelligence (the Apple Foundation Models on-device language model) on supported iPhones, or a local rule-based engine on other devices. Your questions and your health data are processed on the device and are not sent to us, to Apple's servers, or to any cloud service for processing. Baseline does not use any third-party or cloud language model.
3. What leaves your device
Your health data does not. Three ordinary web requests do, and only when you actively use the food features:
- Food search. Searching a food by name sends the words you typed to USDA FoodData Central and Open Food Facts, which return published nutrition figures.
- Barcode lookup. Scanning a packet sends that barcode to Open Food Facts.
- Brand icons. Baseline may fetch a restaurant or brand's own published site icon to illustrate a menu row.
These requests carry the query alone. No identifier, no health data, and nothing that describes you travels with them, and none of them happens unless you are actively searching or scanning. Photographs of meals are read on your device and are never uploaded.
4. What we collect
Nothing. Baseline has no user accounts and no analytics, advertising, or tracking SDKs. We do not collect your name, email, device identifiers, location, usage, or health data. We do not use cookies. As a result we hold no personal information about you, and cannot access, sell, or share it.
5. Notifications
If you allow notifications, Baseline may schedule local reminders on your device — a morning read, an evening nudge, a wind-down, a weekly recap, or a lab recheck. Each is separately switchable in Settings. They are generated and delivered locally by iOS, and their content is never sent to us.
6. Data storage & sync
Preferences and cached readings are stored locally on your device, and for widgets in a private on-device app group container. Your own Baseline settings — your goals, units and dismissals — sync between your Apple devices through your private iCloud key-value store, which is your iCloud account and not ours. Health data itself syncs, if at all, through Apple Health's own iCloud sync. Deleting the app removes its local storage. Because we never receive your data, there is nothing for us to retain or delete on our side.
7. Children
Baseline is not directed to children under 13, and we do not knowingly collect information from them — we do not collect information from anyone.
8. Third parties
Baseline integrates no third-party analytics, advertising, or data brokers. Apple's Health and on-device intelligence frameworks operate on your device under Apple's own privacy terms. The nutrition databases named in section 3 receive only a food query. This website is served as static files and does not track visitors.
9. Your rights
Because your data stays on your device and under your control, you can view, export, or delete it directly through the Apple Health app and iOS Settings at any time. Revoking Baseline's Health permissions immediately stops it from reading or writing any category.
10. Not medical advice
Baseline is a wellness and informational tool, not a medical device, and does not diagnose, treat, or prevent any condition. Always consult a qualified healthcare professional about your health, and before making decisions based on anything the app shows you.
11. Changes to this policy
If this policy changes, we'll update the date above and post the new version on this page.
12. Contact
Questions about privacy? Email hello@hindra.studio.