WHO Percentile Charts
Tap any data point to see the exact date, measurement, and percentile. P3–P97 bands. Sex-appropriate curves. The same charts your pediatrician uses.
WHO & CDC Certified Growth Standards
Every milestone, measured.
Every percentile, understood.
WHO-standard growth charts, precise percentile calculations, and doctor-ready PDF reports — all in your pocket. Your whole family, one app.
5.0 · 10 ratings
Free to downloadNo account needed100% privateWorks offline
WHO & CDC Standards
Zero Cloud Storage
Doctor-Ready Reports
Free to Download
Features
Everything a parent needs to understand their child's growth
Built on the same WHO/CDC standards your pediatrician uses — so what GrowthKit shows you is exactly what the doctor's software shows.
Growth Velocity
See how fast your child is growing — not just where they stand. Weight and height velocity charts reveal slowdowns or acceleration before the next visit.
Doctor-Ready PDF Reports
One tap generates a professional PDF: full growth history, percentile charts, BMI trends, and velocity summary. Share via AirDrop, email, or print.
Multiple Profiles
Track your whole family. Each child and adult gets their own profile, photo, birth date, and independent measurement history. Switch instantly.
BMI Tracking
For children aged 2+, GrowthKit calculates age- and sex-adjusted BMI percentile using CDC standards — with colour-coded category indicators.
100% Private
No account. No cloud. No ads. Your child's data never leaves your iPhone. It's stored in your app's private document directory — only you can see it.
See It In Action
A beautiful app your whole family will use
Clean design that's easy to use at 2am, one-handed. Every screen designed for exhausted parents.
How It Works
Built for parents. Trusted by pediatricians.
Every number GrowthKit shows you is the same number your pediatrician's chart software would show.
Percentile Charts
See exactly where your child stands
GrowthKit plots every measurement against WHO Child Growth Standards — the same reference data your pediatrician uses — and tells you the exact percentile at that moment.
- Weight, height, and head circumference charts from birth
- Precise percentile: not just a band, but the exact number
- Supports boys and girls with sex-appropriate reference curves
- Charts adapt to your child's age automatically
Stats & Velocity
Your child's full story, at a glance
Beyond a single measurement — GrowthKit shows the trends. Growth velocity charts reveal how fast your child is growing month over month, so you can spot patterns early.
- Current height, weight, and BMI in one dashboard
- Growth velocity: cm/month and kg/month over time
- Delta since last entry — see every change at a glance
- BMI percentile with CDC color-coded categories
PDF Export
Walk into every appointment prepared
One tap generates a professional PDF report your pediatrician can actually use — complete growth history, WHO charts, BMI trends, and velocity data, formatted for a medical context.
- Complete measurement history with dates and percentiles
- Embedded WHO charts — the same ones used in clinic
- Share via AirDrop, email, or print directly from your phone
- Generated instantly on-device — no internet required
Get Started
Start tracking in under 2 minutes
No account. No setup. Open the app, add your child, and start logging.
01
Add your child's profile
Enter a name, birth date, sex, and optional photo. Toggle on the metrics you want to track: height, weight, head circumference, or all three. Takes 30 seconds.
02
Log a measurement
Tap Add Entry. Enter height, weight, and/or head circumference. Date defaults to today — or pick any past date. Add an optional note like “After illness” or “Measured at clinic.”
03
See charts, stats, and reports
Your measurement is instantly plotted on WHO percentile charts. Review velocity trends, check the stats dashboard, or export a doctor-ready PDF with one tap.
Your child's data never leaves your phone. Ever.
In a world where everything is in the cloud, GrowthKit is different. Your most personal data — your child's health — stays exactly where it belongs.
No account required
Open the app and start tracking. No sign-up, no email, no password. Your identity is none of our business.
Zero cloud storage
Data lives in your iPhone's private document directory — on your device, under your control. Nothing is sent to any server, ever.
No ads, no data selling
GrowthKit has one business model: the app itself. Your child's health data is not a product. It is not monetised. Full stop.
Parent Stories
Trusted by parents around the world
From new parents anxious about early growth to seasoned parents managing multiple kids — GrowthKit has them covered.
“I showed GrowthKit's PDF to our pediatrician at the 12-month visit and she was genuinely impressed. She said the data was more organised than what most parents bring in. Such a simple app but it makes such a difference.”
Sarah K.
Mum of two, Sydney
“Our son was born slightly small and we were anxious about his growth between doctor visits. GrowthKit showed us exactly which percentile he was tracking — and that he was consistently at the 15th, growing steadily. That consistency is everything.”
James & Priya T.
New parents, London
“I've tried three other growth apps and none of them calculated percentiles correctly. GrowthKit's numbers match exactly what our clinic shows. And having all three kids in one place with separate profiles is a game changer.”
Maria C.
Mother of three, Toronto
FAQ
Common questions
Everything you need to know before you download.
Start tracking your child's growth today.
Free to download. No account needed. Your child's complete growth story — in your pocket.
iPhone & iPadiOS 16+WHO & CDC StandardsWorks offline