Private period tracker app with no account required, works offline
Daily Safety Signal
Stage
Not given
Not given
Founded
Not given
Not given
Based in
Not given
DE
Pricing model
Freemium
Freemium
Pricing
Free for all core features (period logging, calendar, predictions, reminders, export, deletion). Cloud sync: US$3.99 one-time purchase for syncing across devices and transferring records to a new phone.
Free plan includes daily signal reminders and email notifications to up to 3 contacts. Paid plans add SMS notifications, Timer feature, and support for up to 10 email contacts and 1–5 SMS contacts.
Key features
Period and cycle logging in one tap
Next-period prediction with date range and confidence level
Cycle calendar view
Export data as JSON, CSV, or readable summary
One-tap delete all with confirmation
Works fully offline with no internet required
Optional encrypted cloud sync across devices
Ovulation window and ovulation day estimates
No ads, analytics, or third-party data sharing
Daily check-in reminders
Automatic email and SMS alerts to emergency contacts
60-minute grace period after missed check-in
Safety Timer for time-limited activities
Support for multiple emergency contacts
No location tracking or GPS
Pause signals anytime
Contact invitation and confirmation system
EU data storage on Google Firebase
What makes it different
No account required to use — open and start logging immediately
All data stays on your phone by default with no forced cloud sync
Handles irregular cycles by widening prediction range instead of marking you abnormal
Completely free core features with optional one-time paid sync, never a subscription
Privacy-first design with no third-party integrations or data selling
Works automatically without requiring you to take action in an emergency
No GPS tracking or privacy invasion
Contacts don't need to install an app to receive alerts
Designed for daily passive safety, not acute emergencies
Mori
Lunio