Privacy Policy

Marathon Trainer · Last updated: July 9, 2026

This Privacy Policy explains what information Marathon Trainer ("the App," "we," "us") collects, how it's used, and your choices. Please replace the bracketed placeholders below (developer name, contact email, effective date) before publishing this page.

1. Information You Provide

When you set up your training plan, you may enter:

• Age, gender, height, and weight
• Running experience, years running, and current fitness level
• Marathon goal, previous marathon time, and longest recent run
• Days available per week and injury history
• Optional heart rate data: Max Heart Rate, Resting Heart Rate, Lactate Threshold Heart Rate, VO2 Max, and the brand/type of heart rate monitor you use

All of this is entered directly by you and is never required beyond what's needed to generate your training plan. Several fields (heart rate data in particular) are entirely optional and can be skipped.

2. How Your Information Is Stored

Marathon Trainer stores all of the information above locally on your device only, using standard on-device storage. We do not operate a server, we do not have user accounts or logins, and we do not transmit, collect, or have access to any of the information you enter. Nothing you type into this app is sent to us or to any third party.

If you uninstall the app or use the "Start over" option inside it, this locally stored information is deleted.

3. Calendar Access

If you choose to enable "Sync to Calendar," the App will ask for permission to access your device's calendar. With your permission, it creates calendar events for your upcoming workouts (roughly two weeks at a time) directly in a calendar you select on your device. The App only creates and later removes events it created itself; it does not read, modify, or access any other events on your calendar. If your device's calendar app is linked to an external account (such as Google Calendar or Outlook), those events will sync there through your device's own operating system — the App itself does not connect to Google, Microsoft, or any other calendar service directly.

4. Notifications

If you enable daily workout reminders, the App schedules local notifications directly on your device. These are not sent through a push-notification server and do not involve transmitting any data off your device.

5. Data We Do Not Collect

Marathon Trainer does not use analytics, advertising identifiers, or third-party tracking tools. We do not collect device identifiers, location data, or usage statistics. We do not sell or share any information, because we do not collect or receive any in the first place.

6. Health Information

Information such as heart rate values and injury history is used solely to tailor the training plan and workout suggestions shown to you within the App. It is not reviewed by any person, is not used for medical diagnosis, and does not leave your device. Marathon Trainer is not a medical device and the plans it generates are not medical advice — see the in-app disclaimer and consult a doctor before beginning any new training program.

7. Children's Privacy

Marathon Trainer is not directed at children and is not intended for use by anyone under 13 (or the relevant minimum age in your region). We do not knowingly collect information from children, and since all data stays on-device and is user-entered, there is no server-side collection to occur in the first place.

8. Your Choices

• You may skip any optional field, including all heart rate data.
• You may turn off calendar sync or notifications at any time within the App.
• You may delete all stored data at any time using "Start over" in the App, or by uninstalling it.

9. Changes to This Policy

If this policy changes, the updated version will be posted here with a revised "Last updated" date.

10. Contact