Private period tracker app with no account required, works offline
Pediatric growth calculators for WHO and CDC references
Stage
Not given
Not given
Founded
Not given
Not given
Based in
Not given
Not given
Pricing model
Freemium
Free
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.
Not given
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
Baby Growth Percentile Calculator for weight, length, and head circumference
Child Growth Chart Calculator for height and weight using CDC references
Kids and teen BMI calculator with BMI-for-age percentile
Growth velocity calculator for two-date measurement comparison
Corrected-age timeline for preterm birth adjustment
Family-height context calculator using parental heights
Transparent reference selection and calculation documentation
Browser-based calculations with no account or data storage required
Educational guides explaining percentiles, BMI, velocity, and family-height context
Technical measurement-review flags and data provenance links
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
Independent operation with no CDC, WHO, or institutional endorsement or affiliation
Transparent inputs and derived values without invented missing measurements
Educational focus with guides explaining result meaning and limits
Privacy-first design with browser-based calculation and no health record storage
Explicit reference selection without silent substitution of methods or measurements
Mori
Child Growth Lab