Solene is a period and cycle tracker that stays on your phone.

Most tracking apps are built to collect. Solene is built to forget everything except what you choose to keep — on your device, where only you can reach it. On Android, Solene doesn't request internet permission. The networking code isn't disabled; it isn't there. The app physically cannot send your data anywhere, because there is nowhere for it to send it.

Private by design • No account. No sign-in. There is no "user" to identify. • No cloud. Your cycle never leaves your device. • No analytics, no ads, no trackers — ever. • Your data is encrypted at rest, protected by your device's keystore. • Lock the app with Face Unlock or a 6-digit PIN.

Track what matters to you • A cycle ring that shows where you are today, at a glance. • Log flow, symptoms, mood and notes — only the ones you care about. • Add your own custom categories. • A calendar with period, fertile window and luteal phase across the month. • Soft predictions, always labeled as estimates — never false certainty.

Understand your patterns • A clear history of your last cycles, averages and trends. • One honest insight at a time, not a wall of numbers. • Generate a PDF for your doctor, on your device — it never touches a server.

Backups only you can open • Encrypt a backup with AES-256-GCM and a 12-word passphrase that only you hold. • Restore it on any device. We cannot recover it for you, and we will never ask to.

Made for real life • Pregnancy mode and perimenopause mode when your cycle changes. • Home-screen and lock-screen widgets that never show symptoms or notes. • Inclusive, plain language throughout.

Funded by donations, not your data Solene has no ads and no data to sell. A single donation unlocks Premium for the lifetime of your Play account — no subscription required. If you'd like to keep supporting the project, you can, but Premium stays unlocked either way.

Please note: Solene is not a contraceptive and should not be used to prevent pregnancy. The fertile window describes an observed pattern; it is not medical advice.

Solene is a registered trade mark of Nordaxiz Technology Limited.