Privacy Policy

Last updated: March 2026

IntervalBuilder.io is a small tool built for coaches and athletes who want to quickly turn workout ideas into structured interval files. This privacy policy explains what information the site collects and how it’s used.

Short version: we collect very little, we don’t sell your data, and we only store what’s needed to run the app.

Information We Collect Account Information

If you create an account, we may store:

• Email address

• Basic account identifiers

• Authentication information (handled through the login provider)

This information is used only to identify your account and allow you to log in.

Workout Data

When you generate workouts, the prompts you enter and the resulting structured workouts may be stored so the app can:

• Show your past workouts

• Improve the system

• Debug issues

These workouts are associated with your account but are not shared publicly.

Usage Data

We may collect basic usage information such as:

• Feature usage

• Error logs

• Basic analytics

This helps us understand what works, what breaks, and what needs improvement.

Feedback Data

If you submit feedback (for example thumbs-up / thumbs-down on a workout), that feedback may be stored to help improve the system.

Feedback may include:

• The generated workout

• The prompt used

• Your feedback selection

Cookies

The site may use basic cookies or session storage to:

• Keep you logged in

• Maintain session state

• Improve reliability

No advertising cookies are used.

Third-Party Services

IntervalBuilder.io relies on a few external services to function. These may include:

• Authentication providers

• Hosting infrastructure

• AI model providers used to translate workout descriptions

These services may process limited data necessary to operate the platform.

Email Updates

If you create an account or provide your email (for example when donating or contacting us), in the future we may occasionally send emails about:

• product updates

• new features

• important changes to the service

These emails will be infrequent and you can opt out of future updates at any time.

Data Sharing

Your data is not sold.

We only share data with services required to operate the platform (hosting, authentication, AI APIs).

Data Security

Reasonable steps are taken to protect stored data, but no online service can guarantee absolute security. If a security issue is discovered, we will address it as quickly as possible.

Data Deletion

If you want your account or stored workouts deleted, contact us and we will remove them.

Changes to This Policy

This policy may change as the product evolves. If significant changes are made, this page will be updated.