Privacy Policy

Last updated September 12, 2026

The short version: FitZones collects nothing. There are no accounts, no analytics, no ads, no tracking, and no Small Trail Studio servers. Your workout data is stored on your iPhone and, if you choose, in Apple Health. Small Trail Studio never receives it.

Data the app stores on your device

• Workout history: duration, distance, pace, heart rate samples, time in each zone, calories, the route of outdoor workouts, and the zone boundaries in effect at the time. Stored in the app's local database on your iPhone.
• Your profile and settings: age, sex, resting and maximum heart rate, and announcement preferences. Stored locally in the app's settings.

None of this is transmitted to Small Trail Studio or to any third party.

Apple Health

With your permission, FitZones reads your live heart rate during workouts and your resting heart rate from Apple Health, and saves completed workouts (with distance and active calories) back to it. You can turn workout saving off in Settings, and you can change Health permissions at any time in the Health app. Health data is managed by Apple on your device and handled under Apple's privacy policy; FitZones only reads and writes the categories you approve.

Location

For outdoor runs, walks, and hikes, FitZones uses your location while the app is in use (including with your phone locked, until you end the workout) to measure distance and pace and to draw your route map. Indoor workouts never use it. Routes are stored only on your device; they are not saved to Apple Health.

One exception worth being explicit about: after an outdoor workout, the app asks Apple's geocoding service to turn the starting point of your route into a town name (like "Palo Alto, CA") to label the workout in your history. That lookup is processed by Apple under Apple's privacy policy; Small Trail Studio never receives your location.

What FitZones does not do

• No data collection of any kind. The app's App Store privacy label is "Data Not Collected."
• No analytics or crash-reporting SDKs.
• No third-party code that phones home.
• No ads, no tracking, no selling of data (there is nothing to sell).

Deleting your data

• Delete individual workouts from the history screen in the app.
• Deleting the app removes all app data, including history and settings.
• Workouts saved to Apple Health remain there until you delete them in the Health app, where you're in control.

Children

FitZones does not knowingly collect any data from anyone, including children, because it does not collect data at all.

Changes to this policy

If a future version of the app ever changes how data is handled, this page will be updated first and the date above will change. Given the app's design, don't expect much movement here.

Contact

Questions about privacy? Email hello@larrychen.com.