Features
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No account needed
Open Lune and start logging. There is no CKA Systems account to create and no sign-in required to use the app.
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Fully offline
Core tracking works without an internet connection. Your day-to-day use does not depend on CKA Systems servers.
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No ads
Lune does not show advertising and does not share your cycle information with ad networks.
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No analytics
The app does not use behavioural analytics or tracking software to follow how you use it.
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Local, encrypted storage
Cycle logs, symptoms and notes are stored locally on your device in an encrypted application database.
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Optional PIN or biometric lock
Add an optional app lock so access to Lune is restricted on your device. Biometric matching is handled by Android — Lune does not receive your fingerprint or face data.
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Optional encrypted backup and restore
When you choose to export, Lune can create a password-protected backup file you save and manage yourself. Nothing is sent to CKA Systems as part of that process.
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Predictions and pattern insights
Premium adds estimates and insights based on the data you log — such as period timing, fertile-window and ovulation estimates, and cycle summaries. These are statistical estimates, not medical advice.
Free and Premium
Free
Full access to your own data, unlimited history, basic cycle and symptom tracking, and local reminders — always free.
Premium
Advanced predictions, fertile-window and ovulation estimates, PMS prediction, cycle summaries and pattern insights, plus CSV export — and other Premium features described in the app when you subscribe.
Pricing
Lune Premium
£3.99 per month or £19.99 per year
The free tier always includes full access to your own data. Subscriptions are billed through Google Play when available.
Get the app
Lune is coming soon to Google Play.
Coming Soon on Google Play