Free baby growth percentile calculator using WHO and CDC charts for children 0–5 years
Birth control, calmly handled.
Stage
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Founded
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Based in
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Pricing model
Free
Freemium
Pricing
Not given
Free: Core app with all methods, reminders, mood and symptom logging, calendar and cycle views, missed-dose guidance, refill tracking, widgets, and discreet mode. Support (monthly or yearly): Adds encrypted cloud sync, live partner sharing, care-team sharing, deeper insights, observations, travel ad
Key features
WHO Child Growth Standards charts for ages 0–60 months
CDC 2000 growth charts available from age 24 months
Weight, length/height, head circumference, and weight-for-length measurements
Separate growth curves for boys and girls
Corrected age calculation for premature babies born before 37 weeks
Private browser-only growth log with no server upload
Trend alert for faltering growth based on UK NICE guidance
Gain-per-day check between measurements
Works offline after initial page load
Birth control reminders for all methods
Missed-dose recovery guidance
Refill tracking
Mood and symptom tracking
Period and cycle tracking
Encrypted cloud sync
Adaptive reminders
What makes it different
No ads, no account, no data collection—measurements never leave your browser
Official WHO LMS parameters and CDC data with published formulas shown explicitly
Handles measurement precision automatically with date-of-birth mode for young babies
Applies WHO's 0.7 cm adjustment for lying vs standing measurement method at 24 months
Cross-checked data with automated test suite validating WHO medians and clinical thresholds
Method-aware: adapts for all contraception types including long-acting methods
Indie-built, ad-free, and private with no data selling
BabyPercentile
PillBird