Privacy Policy

Zone 2 Training Coach — Last updated May 5, 2025

Zone 2 Training Coach ("the app") is built to help you track your Zone 2 cardio training. Your privacy matters. This policy explains what data the app uses, where it goes, and what it never does.

Data stored on your device

The following information is saved locally on your iPhone and, if you use iCloud, synced privately to your personal iCloud account. It is never sent to our servers:

• Your age (used to calculate your Zone 2 heart rate range)
• Your weekly Zone 2 minute goal
• Your notification preferences
• Your formula preference (Simple or Advanced/Karvonen)
• Your resting heart rate, if you enter one manually

There is no account system. No username, no password, no server-side profile.

HealthKit

The app reads the following data from Apple Health with your explicit permission:

• Heart rate samples during workouts
• Workout sessions (type, duration, start/end time)
• Resting heart rate (optional, for the Advanced formula)

HealthKit data is read on-device only. It is never uploaded, sold, shared with advertisers, or used for any purpose other than calculating and displaying your Zone 2 minutes. We do not write anything back to Apple Health.

Third-party services

The app uses the following third-party SDKs. Each operates under its own privacy policy.

RevenueCat — manages subscriptions and purchase receipts. RevenueCat receives your App Store receipt and an anonymous device identifier to verify your subscription status. No personal information is required or collected. RevenueCat Privacy Policy

TelemetryDeck — privacy-first analytics. TelemetryDeck receives anonymized, aggregated signals (e.g., "paywall viewed") to help improve the app. All signals are hashed and cannot be traced back to you as an individual. No personal data, no IP address, no advertising identifiers. TelemetryDeck Privacy Policy

Sentry — crash reporting. If the app crashes, Sentry sends a diagnostic report that includes the stack trace and device context (OS version, device model). No health data, no personal information, no HealthKit data is ever included in crash reports. Sentry Privacy Policy

What we never do

• Sell your data to any third party
• Use your health data for advertising
• Share your data with data brokers
• Collect your name, email, or any identifying information
• Track you across other apps or websites

Children

The app is not directed at children under 13 and does not knowingly collect data from them.

Changes to this policy

If this policy changes materially, the updated version will be posted at this URL with a new "Last updated" date.

Contact

Questions about this policy? Email jmdevapps@gmail.com.