Seedling: Baby Growth Tracker
Private WHO percentile charts
About
Track your baby's growth with WHO and CDC charts. This app offers detailed percentile tracking, growth velocity, and trajectory estimation. Export data for your pediatrician and manage multiple child profiles privately.
What's New in Seedling
1.5
June 3, 2026
• Head circumference is now a tracked measurement. Fourth chart on each kid's detail screen, with percentile, growth velocity, time-range filters, an exact-value table, and biologically-implausible-value warnings. • Cm/inches toggle for head circumference in Settings. • Head circumference values round-trip through CSV import and export. • Head circumference appears on the pediatrician PDF report. • The Growth Trajectory Estimator now projects head circumference, alongside weight and height. • Weight is the top chart on each kid's detail screen now, with length/height second, weight-for-length third, and head circumference fourth. The measurement input form follows the same order. • Weight-for-length percentile curves no longer crisscross under the CDC reference body on the "All" view. Cleaner under both WHO and CDC now. • Custom date ranges on the growth charts render correctly for every window, including ranges before the current age band, or ranges that cross the two-year mark. • Under the CDC baseline, the head-circumference chart uses CDC data through 36 months and WHO data above that. A short on-chart note explains the source.
MoreDeveloper apps
FAQ
What is Seedling?
Seedling is a baby growth tracker that uses WHO and CDC growth charts to monitor a child's height, weight, and head circumference. It provides detailed percentile tracking, growth velocity, and trajectory estimations, with data export options for pediatricians.
How accurate is Seedling's growth tracking?
Seedling uses the LMS method sourced directly from WHO and CDC data for accurate percentile calculations. It allows for two-decimal precision in charts, tables, and exports for clinical detail.
Does Seedling have ads?
No, Seedling is completely ad-free. It was built with a focus on privacy and does not contain any advertisements.
What devices does Seedling support?
Seedling is available for iPhone and iPad devices.
How often is Seedling updated?
The latest version of Seedling is 1.5, and it was last updated on June 3, 2026. Updates typically focus on refining features and ensuring compatibility.
Can I use Seedling offline?
Yes, Seedling works fully offline. All percentile calculations are performed on your device, ensuring your data remains private and accessible without an internet connection.
What is the price of Seedling?
Seedling is a one-time purchase of $2.99. There are no subscriptions or hidden fees, and all features are available upon purchase.
How does Seedling handle preemie babies?
Seedling supports preemie babies by allowing you to enter a gestational age under 37 weeks. The app will automatically display the corrected age for the first two years, ensuring accurate growth tracking.