Anelle: Period & Cycle Tracker

Anelle is a period tracker and cycle calendar that keeps everything on your phone. No account, no cloud, no ads, and the app does not even have permission to use the internet. What you log is encrypted on the device, and you can add a PIN or fingerprint lock in Settings.

KNOW WHAT IS COMING
• Your next period as a date with a range, for example "around 12 November, ±2 days"
• An estimated fertile window and ovulation day, always marked as an estimate
• Predictions learn from every period you log and adapt when your cycles vary
• A one-off late cycle after stress, travel or illness does not throw the estimate off
• A calm note when your period is taking a little longer, never an alarm

LOG IN A FEW TAPS
• Period started or ended with one tap
• Flow, symptoms, mood and energy, discharge, sex, basal body temperature and a note
• Hide the fields you do not use

CALENDAR AND INSIGHTS
• A month calendar with logged periods, predicted days and the fertile window, shown with patterns as well as colour
• Correct past periods at any time; predictions update at once
• Average cycle and period length, a chart of your recent cycles and how much they vary
• Symptom patterns, such as cramps that usually start a day or two before your period

PRIVATE BY DESIGN
• No internet permission, so nothing you log can leave the phone through the app
• Entries encrypted with AES-256 under a key kept in the Android Keystore
• 6-digit PIN with optional fingerprint unlock and auto-lock
• App content hidden on the recent apps screen
• No analytics, no trackers, no ad SDKs
• Delete everything, keys included, in two steps

YOUR DATA, YOUR FILES
• A password-protected backup file that you save where you like, to move to a new phone
• CSV export for your own spreadsheet
• Import from Drip or from a spreadsheet with a date column

GENTLE REMINDERS
• Before your period, at the start of the fertile window, or a daily reminder to log
• Discreet notification text by default

Free, with no premium tier. Light and dark mode, 21 languages.

Anelle shows estimates based on what you log. It is not a medical device and must not be used for birth control or to plan a pregnancy. If something about your cycle worries you, talk to a health professional.

Developed by Lunar Code Tech, Netherlands.