Growth tracker A baby growth tracker with WHO charts
Add weight, length and head circumference to WHO growth charts, calculated on your device. The charts can use corrected age for babies born early. With Plumi Pro, print a Baby Card for the checkup.
- WHO percentile curves Weight, length and head circumference plotted on WHO growth standards, calculated on your device.
- Corrected age for babies born early Enter gestational age at birth to use corrected age on the charts until age two.
- Printable appointment summary With Plumi Pro, print the Baby Card with growth percentiles and recent feeding, sleep and health records.
WHO percentiles, on your phone
Add weight, length and head circumference measurements to their WHO charts. See new measurements alongside earlier ones, with percentile bands and your baby’s line drawn on top.
One card for the doctor's visit
With Plumi Pro, print the Baby Card with growth percentiles, 30-day care averages and recent health records. Choose A4 or US Letter for the appointment.
Averages over 30 days · Generated by Plumi
Free logging, one Pro subscription for sharing
Logging is free, with no account needed. Plumi Pro adds sync, reminders and family sharing. One Pro subscription covers the people you invite, each with their own account. See how to share with a nanny or caregiver.
- Free baby logging
- No account for free logging
- End-to-end encrypted Pro sync
Growth tracker questions
Is the growth tracker free?
Yes. Logging measurements and seeing them on WHO percentile charts is free forever, with no account needed. Plumi Pro adds sync, sharing and the printable Baby Card.
What growth charts does Plumi use?
The WHO Child Growth Standards, the charts most pediatricians use for babies and toddlers, for weight, length/height and head circumference. The curves show the 3rd–97th percentile bands with the median marked, and your baby’s measurements plotted on top.
What does a percentile actually mean?
A percentile compares your baby with other children of the same age and sex: at the 62nd percentile for weight, your baby weighs more than 62 of 100 peers. There is no “good” percentile. Pediatricians care about the trend along a curve, not the number itself. If you’re curious right now, try our free growth percentile calculator.
Can the charts use corrected age?
That’s what corrected age is for: measuring from the due date instead of the birth date, so a baby born 8 weeks early isn’t compared against full-term peers. Enter the gestational age at birth and Plumi corrects the percentile charts automatically, phasing it out by age two. There’s also a free corrected age calculator.
How often should I weigh and measure my baby?
Growth is judged over weeks and months, and home scales vary, so frequent weighing at home usually adds little. Log measurements from regular checkups. If you are unsure how often to measure, ask your pediatrician.
Can I show the chart to my pediatrician?
Yes. With Plumi Pro, print the Baby Card with growth measurements and recent care averages. You can also export your full history as CSV for free.
Are measurements in metric or imperial?
Either. Plumi shows kg and cm or lb and in following your preference, with both displayed side by side on measurements.
Can grandparents follow along?
Yes. With Plumi Pro you can share each child in a group of up to 5 people, including you. Invite a partner, grandparents or the nanny, each with their own login, and one subscription covers everyone. It’s all end-to-end encrypted.
Keep their growth measurements together
Growth charts are free forever. Plumi Pro adds the printable Baby Card, sync and sharing.
