Privacy Policy

Effective date: April 10, 2026
Last updated: April 10, 2026

1. Overview

Zone Training Log (“Zone Trainer,” “we,” “us”) respects your privacy and is committed to protecting your personal information. This policy explains what data we collect, how we use it, how we store it, and the choices you have.

This policy applies to the Zone Training Log iOS app and our website at https://zonetraininglog.com.

2. Who We Are

Controller: Code Marketer s.r.o.
Contact email: ondrej@sevcik.dev
Address: Na Nabrezi 231/6, Havirov, 736 01, Czech Republic

3. Data We Collect

A) Health Data (via HealthKit)

With your permission, we read and write HealthKit data such as:

• Workouts and activity details
• Heart rate samples
• Effort ratings and related metrics

We use this data to compute training zones, summaries, and your training log. We do not use HealthKit data for advertising or marketing.

B) App Content You Create

• Manual workouts
• Tags, notes, and labels
• Activity color preferences
• Zone definitions and settings
• Planned workouts and AI prompt inputs you choose to enter

C) App Usage & Settings

• App preferences (e.g., appearance, configuration)
• Feature state and local settings
• Device-linked AI consent status and accepted privacy-policy version

D) Purchases

We use Apple's StoreKit to process purchases. We do not receive or store your payment card information. We may store subscription status and entitlement state returned by Apple.

E) AI and Rewarded Ad Data

If you use AI workout suggestions, the app may send workout history, planned workouts, workout titles, workout descriptions, durations, heart rate, pace, elevation, effort, and the AI prompt text you enter to our backend and to OpenAI to generate a suggestion.

For free-tier AI generations, we also use Google AdMob rewarded ads. AdMob may process ad request data, device and app identifiers, reward verification callback data, and related anti-fraud information to deliver and verify rewarded ads.

4. How We Use Data

• Sync and display workouts, summaries, and zones
• Calculate time-in-zone metrics
• Restore purchases and entitlements
• Generate AI workout suggestions when you explicitly use AI features
• Verify rewarded ads required for free-tier AI generations
• Provide customer support
• Improve app reliability and performance (diagnostics only)

5. Data Sharing

We do not sell your personal data. We only share data with:

• Apple (HealthKit, iCloud, and App Store services)
• OpenAI, to generate AI workout suggestions that you request
• Google AdMob, to deliver and verify rewarded ads for free-tier AI usage

We may also share data if required by law or to protect our legal rights.

6. Data Storage & Retention

• Most data is stored locally on your device.
• If iCloud sync is enabled, data is stored in your iCloud account, governed by Apple's policies.
• AI-only workout history sent for suggestion generation is intended to be processed transiently and is not kept as your long-term synced workout history on our backend.
• Short-lived AI request state and generated results may be retained briefly to finish reward verification, recover interrupted requests, and return the result to your device.
• We retain data only as long as needed to provide app functionality.
• You can delete the app to remove local data. iCloud data is managed by Apple; you can remove it via iOS/iCloud settings.

7. Your Choices

• HealthKit access: You can grant or revoke access at any time in Settings > Health.
• AI consent: You can accept or revoke AI access in the app. If you do not accept the current AI privacy terms, AI features stay disabled.
• Purchases: Manage subscriptions in Settings > Apple ID > Subscriptions.
• Data deletion: You can delete the app or contact us to remove data you've shared with us.

8. International Users

If you use the app outside your country, your data may be processed in the country where your iCloud account is hosted by Apple.

9. Changes to This Policy

We may update this policy periodically. The latest version will always be posted on our website, and the “Last updated” date will reflect changes.

10. Contact

If you have questions or requests, contact us at:
ondrej@sevcik.dev