Free baby growth percentile calculator using WHO and CDC charts for children 0–5 years
Daily Safety Signal
Stage
Not given
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Founded
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Based in
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DE
Pricing model
Free
Freemium
Pricing
Not given
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
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
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 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
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
BabyPercentile
Lunio