Support

Cevren is made by one small company. Email reaches a person, usually the same day.

Common questions

How do I cancel my subscription?

In Settings on your iPhone: tap your name, then Subscriptions, then Cevren. Cancel at least 24 hours before your current period ends to avoid being charged for the next one. You keep Premium until the period you've paid for runs out.

We can't cancel a subscription for you — only Apple can.

I paid but Premium isn't showing.

Open the paywall and tap Restore Purchases. That reconnects an existing subscription after a reinstall or a new device. If it still doesn't appear, email us with the Apple ID you purchased under and we'll sort it out.

How do I delete my account and data?

Settings, then delete your account. It removes your protocol, daily logs, lab results, cycle history and profile — from your phone and from our servers — immediately and permanently.

This does not cancel your subscription. Cancel that separately in your iPhone's Settings, or Apple will keep billing you.

Why isn't my HRV or resting heart rate showing?

Not every device writes those to Apple Health. Oura rings, for instance, write raw heart-rate samples but not HRV or resting heart rate, so those fields stay blank even though the ring measures them. Apple Watch writes both.

If a metric is empty, the app will tell you nothing on your phone is writing it, rather than leaving you guessing.

What happens to a lab report I upload?

It's sent to Anthropic to be read, which is how the markers get extracted. We ask you before that happens the first time. We don't keep the file — only the markers you accept.

The Privacy Policy describes this in detail.

Is Cevren medical advice?

No. Cevren is educational software. It doesn't diagnose or treat anything, it doesn't recommend or advise on any substance, and its analysis is speculative rather than conclusive. Discuss any change to your protocol with a qualified clinician.

Is there an Android version?

Not yet. Cevren is iPhone only for now.

Requesting your data

You can delete everything yourself from Settings. If you'd like a copy of your data, or have a question about how it's handled, email [email protected] and we'll respond.

Reporting a problem

If something's broken, tell us — we'd rather hear it than not. If you've found a security issue, email us directly rather than posting about it publicly, and we'll get back to you quickly.