Herr terms of use

Plain-language terms.

Last updated: March 7, 2026. These terms govern use of the Herr mobile application and related public pages.

1. Use of the app

Herr is provided for personal, non-commercial use as a relationship-support and educational tool. You agree to use the app lawfully and responsibly.

2. Not medical advice

Herr does not provide medical diagnosis, treatment, fertility care, contraception advice, or emergency support. You should not rely on Herr as a substitute for a licensed healthcare professional.

3. Accuracy and predictions

Cycle predictions are estimates based on the information entered into the app. Irregular cycles, incomplete logging, or biological variation may reduce accuracy.

4. Acceptable use

  • Do not misuse the app to harass, manipulate, or harm another person.
  • Do not attempt to reverse engineer or interfere with the app or service.
  • Do not represent Herr as medical guidance.

5. Availability and changes

Herr may change features, content, or availability over time. We may update these terms as the product evolves.

6. Contact

For questions about these terms, use the public support page at /support.