Effective August 9, 2026 — ZoneCycle: HIIT Bike Trainer
ZoneCycle collects no data. There are no accounts, no sign-ins, no analytics, no advertising, and no tracking of any kind. Everything the app knows about you lives on your phone.
ZoneCycle reads your heart rate from a Bluetooth chest strap (or your bike's console) and power, cadence, and calorie data from your air bike, over a direct Bluetooth connection between your phone and your equipment. This data is processed on your device to run your workout and is stored only on your device (and in your device backups) as your workout history. It is never uploaded, shared, or seen by us — the app has no server.
If you tap "Save to Apple Health" on a finished session, ZoneCycle writes that workout — its duration, active energy burned, and average heart rate — into Apple Health. This is a one-way, write-only connection that happens only when you ask for it: the app requests permission to write those three data types and never requests permission to read anything from Apple Health. It cannot see your existing Health data.
Your name, age, and fitness level are used only to calculate your heart-rate zones (using the published Tanaka formula) and never leave your device.
Bluetooth is used solely to connect to your fitness equipment (such as a Rogue Echo Bike console or a Polar heart-rate strap). To find your equipment, the app briefly scans for nearby Bluetooth devices and shows you only the ones whose names look like an air bike or a heart-rate monitor. That scan happens entirely on your phone: nothing about the devices around you is stored after the scan or transmitted anywhere.
The app makes no network requests during normal use. The one exception: tapping the "Tanaka formula" reference link in setup opens Wikipedia in your browser, which is governed by Wikipedia's own privacy policy.
The app collects no data from anyone, children included.
If this policy ever changes, the updated version will be posted at this address.