Lusine Your cycle, kept to yourself.
Lusine tracks your period, symptoms, and fertility signals — without an account, a server, or a single line of analytics.
Everything you'd expect. Nothing you wouldn't.
Lusine covers the full picture — dates, symptoms, fertility inputs, and the patterns that connect them.
Periods & flow
Log start and end dates and flow intensity. Lusine learns your rhythm and estimates what comes next.
Symptoms your way
Mood, energy, and notes, plus custom symptoms with their own intensity and timing.
Fertility signals
Basal body temperature charting with coverline and shift detection, plus LH test results on a timeline.
Calendar view
Past periods, predicted days, and your fertile window at a glance, with markers for days you logged.
Patterns & insights
Cycle history, variability, and recurring symptom timing — surfaced once there is enough to be meaningful.
Gentle reminders
Optional nudges before your period, when your fertile window opens, or for a quiet daily check-in.
Private by architecture, not by promise.
Most tracking apps ask you to trust their servers. Lusine doesn't have any. Your cycle data is written to your device and stays there unless you explicitly move it.
- ✓No account. There is nothing to sign up for. No email, no password, no profile.
- ✓No server. Lusine has no backend. Your entries are never transmitted to us, because there is no “us” to transmit them to.
- ✓No analytics or tracking. No SDKs, no crash reporters harvesting your data, no advertising identifiers.
- ✓iCloud backup is opt-in. Off by default. When you turn it on, the backup goes to your own private iCloud, under your Apple Account — not to us.
- ✓Apple Health is opt-in. Lusine writes only what you approve, and requests read access solely at the moment you tap Import.
- ✓Your data is portable. Export a full JSON backup, a CSV, or a clinician-friendly summary whenever you want.
Built for sharing with a clinician — on your terms.
When it's useful to bring your history to an appointment, Lusine generates a clean summary you can hand over. Nothing is shared automatically, and nothing leaves your device until you choose to send it.
Lusine supports cycle awareness and personal recordkeeping. Its estimates and insights are educational, may be wrong, and are not medical advice, diagnosis, treatment, or contraception guidance. Always consult a qualified clinician for medical concerns.