A calm monthly guide for period timing, ovulation, and cycle planning
Private period tracker app with no account required, works offline
Stage
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Founded
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Based in
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Pricing model
Free
Freemium
Pricing
Not given
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.
Key features
Next period forecast with estimated date and timing
Ovulation date estimation
Fertile window calculation
Adjustable cycle length and period length
Bilingual interface in English and Chinese
Planning tools for travel, workouts, and routines
Late period calculator tool
Irregular period cycle calculator
Body tracking and notes capability
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
What makes it different
Calm, gentle interface designed for ease and regular return visits
Comprehensive monthly view showing period, ovulation, and fertile window in one place
Educational planning tool paired with guidance to seek medical care when needed
Support for irregular cycles with range view
Practical focus on dates and timing people need most for planning
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
Mori