When.Sign inWhen.Sign inThese terms cover your use of When. By creating an account or using the app, you agree to them. We have kept them short and in plain words.
When. learns your cycle from the period dates you log and writes its predictions to a calendar you connect. These predictions are only estimates based on your own data. They are best guesses, not certainties, and the dates can be wrong, ovulation especially. Please do not treat a predicted date as a fact about your body.
You must be 18 or older to create an account and use When.; by registering you confirm that you are. We never ask for or store your age or date of birth. The tick at sign-up is the only record, and it is just a yes. When. is not directed at children.
When. is a planning tool, not a medical device, and nothing in it is medical advice. Its predictions are not a diagnosis and cannot tell you whether you are fertile, pregnant, or unwell. Do not use When. to avoid or try for a pregnancy, to detect a condition, or in an emergency. Decisions about your body, your health, and contraception are yours to make, ideally with a doctor or another qualified professional, and you make them at your own risk, not on the strength of a prediction here.
You are responsible for what happens under your account and for keeping your sign-in safe. Use When. for yourself; do not resell it, abuse it, or try to break, copy, or reverse-engineer the service. If your misuse of When., or your breach of these terms, leads to a claim against us, you agree to cover the reasonable costs of dealing with it.
The cycle data you log is yours, and you can export or delete it any time. When. itself, its name, its look, and its code are ours; using the app gives you a personal, limited right to use it for yourself, and nothing more.
When. is free for the first 21 days. After that it costs €4/month, billed through our payment provider, Polar, who acts as the seller of record and handles checkout, tax, and your card details. We never see your card. The subscription renews each month until you cancel.
You can cancel any time from the subscription page. Simply not using When. does not cancel it, so cancel there to stop future charges. Your access then continues until the end of the period you have paid for, and you are not charged again. If you are in the EU, you have a 14-day right to withdraw from a purchase. By choosing to start using the app right away, you ask us to begin before that window ends and you accept that, once it has begun, the 14-day right no longer applies. If something has gone wrong, email us and we will make it right.
We work to keep When. running and as accurate as your data allows, but we provide it as is and as available, with no warranty that it will be accurate, uninterrupted, error-free, or fit for any particular purpose. Calendar providers and other services we rely on can change or have outages outside our control. We may add features, change them, or retire them with notice.
To the extent the law allows, When. and its makers are not liable for indirect or consequential loss, or for any decision you make based on a prediction, and our total liability to you for any claim is limited to what you paid us in the twelve months before it arose. Nothing here limits rights that cannot be limited by law, including liability for death or personal injury caused by our negligence, and your rights as a consumer.
You can close your account any time from Settings, which deletes your data. We may suspend or close an account that breaks these terms or the law, and we will tell you why where we can.
How we handle your data is set out in our privacy policy, which is part of these terms.
We may update these terms as the app grows. If a change is significant we will say so; continuing to use When. after a change means you accept the new terms.
If part of these terms turns out not to hold, the rest still applies. These terms and the privacy policy are the whole agreement between us about When.
These terms are governed by the laws of Bulgaria and the European Union, and this does not take away the protection of the consumer laws of the country you live in. Please email us first if something is wrong, so we can try to put it right; if we cannot settle it between us, EU consumers can also use an out-of-court dispute resolution scheme available where they live.
Email us at hello@getwhen.net and we will answer.
Last updated 4 June 2026.