Privacy Policy
Last updated 8 September 2026
Follix classifies your Norwood stage from photos you take. This page describes exactly what leaves your iPhone, what does not, and what happens to the part that does. It matches the App Privacy label on the App Store.
No account, ever
There is no sign-up, no email address, no password and no login. We do not know who you are. The app identifies itself to our server with a random identifier generated on your device and stored in the iOS Keychain. It is not linked to you, your Apple ID, or any advertising identifier.
What leaves your iPhone
| What | When | Why |
|---|---|---|
| The five scan photos | Only when you tap Analyse | To classify one Norwood stage |
| Your App Store subscription receipt | With each scan | To check the scan is covered |
| The anonymous device identifier | With each scan | To enforce the scan allowance |
What happens to the photos
- They are sent over TLS, with certificate pinning, to a server in the European Union.
- They are held in memory only, for the duration of the classification.
- They are discarded immediately afterwards. They are never written to disk, never backed up, and never used to train any model.
- Only the resulting stage comes back to your phone.
- The server's log records the anonymous identifier, a timestamp and the resulting stage. It does not record the images or anything derived from them.
What never leaves your iPhone
- Your medication log: what you take, the dose, and since when.
- Your side-effect journal.
- Your notes, schedules and reminders.
- The style options you try.
- Copies of your scan photos, if you choose to keep them, which stay in the app's own storage.
What we do not collect at all
No analytics of any kind. No Firebase, Mixpanel, Amplitude or Segment. No third-party crash reporting. No advertising identifier and no ad networks. No tracking across apps or websites, by us or by anyone else.
Where the data is processed
Inference runs on European infrastructure and the model provider is European. Nothing is processed on servers outside the European Union.
Your rights
Because there is no account and the photos are discarded on receipt, there is no personal profile to export or erase. Deleting the app removes everything held on your device, including the medication log and the journal. To ask a question about this policy, use the support page.
Children
Follix is for adults. It is not directed at anyone under 18.
Medical disclaimer
Follix is educational and informational. It places you on a visual scale. It is not a medical device and does not replace a dermatologist.
Changes
If this policy changes in a way that affects what leaves your device, the app will say so before the next scan.