The deal.

Four Phases is informational and educational software designed to help partners understand the menstrual cycle. It is not a medical device, not a diagnostic tool, not contraception, not fertility planning. It uses general averages to predict cycle phases and generate coaching content; predictions can be wrong, and the coaching is general advice, not clinical guidance.

Nothing in Four Phases is medical advice. If your partner is in pain, has irregular bleeding, missed periods, or anything concerning — talk to a real clinician. Don't use Four Phases to diagnose, treat, or prevent any condition. Don't use Four Phases as contraception or for fertility planning.

You agree to use Four Phases only with the consent and awareness of the person whose cycle you are tracking. Four Phases is built to help you be a better partner — not to surveil, control, or manipulate anyone. Misusing the app this way is against these terms and may also be illegal where you live.

You agree not to attempt to reverse-engineer, scrape, or otherwise abuse the service.

Four Phases has no traditional accounts. By default your cycle data stays on your device. If you turn on Live Sync, three cycle numbers (last period date, cycle length, period length) are stored on our server against a random link token — no name, no account — so they reach your partner's app; either of you can delete them instantly from within the app. If you sign up for the waitlist or redeem a beta invite, you authorize us to email you about Four Phases. You can unsubscribe or request deletion at any time at hello@voreli.ai.

The Four Phases name, brand, app design, written content, and source code are owned by us. You may use the app for personal, non-commercial purposes. You may not copy, redistribute, or create derivative products without written permission.

Four Phases is provided "as is" with no warranties, express or implied, including warranties of fitness for a particular purpose. To the maximum extent permitted by law, we are not liable for any indirect, incidental, or consequential damages arising from your use of the app.

We may update these terms as Four Phases grows. Material changes will be flagged on the homepage. Continuing to use the app after changes means you accept them.

Questions: hello@voreli.ai.