Privacy Policy
The short version: TreadPilot collects nothing. There are no accounts, no analytics, no advertising and no third-party code. The app makes no network requests at all — it has no server to talk to. Your workouts are stored on your iPhone, and go to Apple Health only if you allow it.
Who we are
TreadPilot is developed by Backlog Fejlesztő Kft., Budapest, Hungary. You can reach us at hello@backlog.hu.
The app is open source. You do not have to take any of this on trust — the complete source code is public at github.com/backloghu/treadpilot, and you can verify every claim on this page by reading it.
What the app stores, and where
When you use TreadPilot, it records your workouts: speed, incline, distance, duration, calories, step count, elevation gain and — if you wear an Apple Watch — heart rate. It also stores your workout programs and the body measurements used for calorie estimation.
All of this is stored locally on your iPhone, in the app's own database. It is included in your device backups (iCloud or local), because that is how iOS backs up apps. It is not sent to us or to anyone else.
Apple Health
TreadPilot asks for two kinds of Health access. Both are optional — the app works without either, using default or manually entered values.
Reading — body mass, height, date of birth and biological sex. These are used only to make the calorie estimate reflect your body rather than an average one, and the calculation happens entirely on your device. You can override every one of these values by hand in the app and never grant Health access at all.
Writing — completed workouts, with active energy burned, distance and heart-rate samples. This happens only for real treadmill workouts, only after you permit it, and workouts recorded in Demo Mode are deliberately never written to Health.
Health data is never used for advertising or marketing, never shared with third parties, and never leaves your device by our doing. Once a workout is in Apple Health, Apple's own privacy terms govern it, and you control it from the Health app.
Bluetooth
Bluetooth is used for exactly one thing: talking to your own treadmill. The app scans for fitness equipment, connects to the machine you pick, reads its live data and sends it speed and incline commands. It does not use Bluetooth to infer your location, does not look for beacons, and does not record what other devices are nearby beyond showing you the list of treadmills you can connect to.
Apple Watch
The Apple Watch companion app measures your heart rate during a workout and sends it to the iPhone app over Apple's own device-to-device link. It does not store anything separately and does not communicate with anyone else.
What the app does not do
- No user accounts, no sign-in, no email address required
- No analytics, crash reporting or usage measurement of any kind
- No advertising, and no advertising identifiers
- No tracking, and therefore no App Tracking Transparency prompt
- No third-party SDKs or libraries — the app has no external dependencies
- No network requests whatsoever. The app contains no networking code at all
Deleting your data
Because everything lives on your device, you are in full control:
- Delete a single workout by swiping it away in the History list.
- Delete everything by deleting the app — that removes its entire database.
- Workouts already written to Apple Health are managed in the Health app, under Browse → Activity → Workouts. Deleting the TreadPilot app does not remove them, by design: they are your training records.
- Revoke Health or Bluetooth permission at any time in Settings → Privacy & Security.
Children
The app is not directed at children and collects no data from anyone, regardless of age. It does control a motorised treadmill belt, so it should not be used by children unsupervised — the app says so on first launch.
Your rights
Data protection law (including the GDPR) gives you rights of access, correction, erasure and portability over personal data a company holds about you. We hold none. We have no database of users, because the app never sends us anything. If you would like this confirmed in writing, or have any question about it, write to hello@backlog.hu and we will answer.
Changes to this policy
If the app ever gains a feature that changes any of the above — for example an optional cloud backup or a Strava upload, which would necessarily involve sending data somewhere — this page will be updated before that feature ships, and the change will be visible in the public commit history of this very page.
Contact
Backlog Fejlesztő Kft., Budapest, Hungary — hello@backlog.hu