On-device cycle & perimenopause tracking
Selene tracks your cycle, fertility window, and perimenopause — and every insight is computed on your phone. No account, no cloud, nothing to breach or subpoena.
The promise
We cannot hand over what we never have.
Reproductive-health data sitting in someone else's cloud has become a real legal liability. Selene's answer is the simplest one: keep it on your phone, and keep it that way — provably.
The insight engine runs locally. There is no Selene server holding your logs — so there is nothing to breach, subpoena, or quietly hand over.
Your records are stored encrypted on-device and kept out of cloud backups, so they don't leak through a sync you forgot about.
Selene is paid for by the people who use it. Your cycle is never a product, an audience segment, or a line item.
What Selene does
Math you can trust instead of a chatbot's guess. Every prediction is shown as a range, with the confidence it deserves.
Note a symptom however it comes to you — a quick tap, a sentence, or a spoken aside. Selene structures it on-device into clean, searchable data. Nothing is transcribed in the cloud.
A deterministic statistical engine estimates your next period and fertile window — presented as a range with a confidence band, never a false precision. Predictions, not promises.
Selene finds the clusters you'd never spot by scrolling — the headaches that track with poor sleep, the mood shift that arrives two days before bleeding — and explains them in plain sentences, written on your device. No model in a data center ever reads your diary.
Hot flashes, night sweats, brain fog, and irregular cycles — tracked seriously, not as an afterthought the fertility-first apps skip.
When it's time to see someone, Selene assembles a clear summary of your patterns and timeline — organized for a real conversation. You choose what to share, on your terms. It's a way to bring your own history into the room, not a diagnosis.
How it works
Tap, type, or speak. Selene captures and structures each entry locally, the moment you record it.
On-device math computes your forecasts and surfaces symptom clusters — recalculated as your history grows.
Review your trends, prepare a doctor-visit summary, and share only what you choose. Confirm it all in airplane mode.
Pricing
Because inference runs on your device and costs us nothing to run, a lifetime option is genuinely safe to offer.
Track your cycle and symptoms for as long as you like, at no cost.
The full on-device intelligence layer. Try it free for seven days.
Pay once, keep Insight forever. No inference cost means we can mean it.
Prices shown for reference. Manual logging stays free regardless of plan.
Questions
No. Selene's insight engine runs entirely on-device, and your records are stored encrypted and excluded from cloud backups. There is no Selene account and no Selene server holding your data. You can confirm it yourself: switch on airplane mode and the app keeps forecasting and narrating as normal — because nothing was ever being sent.
No. Selene is a tracking and reflection tool. It estimates your cycle and fertile window as predictions with ranges — it does not prevent pregnancy and should not be relied on to. It helps you notice patterns and organize your own history for a conversation with your doctor. It is not a diagnosis and not a substitute for professional medical care.
Your most private data shouldn't live on someone else's server. Cloud period trackers have faced privacy scrutiny and settlements over how reproductive data is stored and shared. Selene's view is simpler: the safest data is the data we never collect. We can't lose, sell, or surrender what never leaves your device.
By a deterministic statistical engine — transparent math over your own logged history, not a generative chatbot guessing. That's why every estimate comes with a range and a confidence level instead of a single overconfident date.
Selene
Track your cycle, fertility, and perimenopause with insight that never leaves your hands. Free to start, honest by design.