WHO Growth Tracker & Predictor

Predict Baby Clothes Size. Shop Smart & Thrift Ahead

Stop guessing. SizeSeason crosses pediatric WHO growth percentiles with local seasonal temperatures to forecast your child's exact clothing sizes for the entire year.

Growth Forecast
Seasonal Timeline
100% Offline & Private
Spring (Age 3-5m) 🌸
3-6 Months

EU Size 62-68

Average 14°C (Mild)
Summer (Age 6-8m) ☀️
6-9 Months

EU Size 74

Average 24°C (Warm)
Autumn (Age 9-11m) 🍁
9-12 Months

EU Size 80

Average 12°C (Cool)
Winter (Age 12-14m) ❄️
12-18 Months

EU Size 86

Average 3°C (Cold)

Smart Utilities For Modern Parents

Every feature is designed to reduce waste, save budgets, and track developmental growth.

WHO Growth Curve Engine

Input your baby's height/weight and let the app adjust predictions to their actual growth percentile (e.g. 10th or 90th). Full support for gestational age correction.

Weather-Linked Forecast

Map your baby's growth timeline against average regional temperatures. Features 150+ pre-compiled offline climate profiles to ensure weather and sizes sync perfectly.

Wardrobe Gap Detector

Log what baby clothes you already own. SizeSeason compares your inventory with future seasonal size predictions, listing exactly what is missing.

PDF Thrifting Lists

Export minimal checklists containing missing sizes and item categories. Print it out or look at it on your phone while sorting through garage sales or flea markets.

Interactive Vector Charts

Log regular pediatrician measurements. Visualize weight and height progress on beautiful vector charts aligned with WHO percentiles (3rd, 50th, and 97th).

100% Privacy-First

Zero accounts, zero registration, and zero cloud databases. No advertisements, SDK tracking, or analytics. Your child's growth logs belong only to you.

Size Forecast Calculator

Try the simulation below. Choose your baby's birth month and growth percentile to see their forecasted sizes for the upcoming seasons.

Forecasted Timeline