4 months
4-Month Sleep Regression: Why Does It Happen, When Does It End?
Why is your 4-month-old suddenly waking more at night, when does it end, and what helps this week? A calm, source-based guide. Safe sleep rules stay the same.
Baby tracker app
Your baby’s sleep, feeding and growth in one place
RADLE logs feeds, sleep, diapers and growth in seconds. Shared with your partner, in sync on every device.
Free to download · iPhone and Android
Who fed the baby? When was the last nap? When was the last diaper change? RADLE remembers it all, so you can stay with your baby.
One tap, even at 3 a.m.
Built for tired parents: fewer taps, clearer answers.
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Sleep Coach
Predicts the next nap from your baby’s own rhythm and builds a personal sleep plan.
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Live sleep tracking
Start sleep with one tap and watch it live on your Lock Screen and Dynamic Island. See it instantly when your partner starts it.
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Feeding and diapers
Log breastfeeding, bottles, pumping and diapers in detail, with the whole day on one screen.
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Solid food guide
Which foods and textures fit which month, plus the foods to hold off on.
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Growth charts
Follow weight, height and head circumference on WHO percentile curves.
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Family sharing
Partner, grandparent or caregiver: everyone sees the same log and who did what.
A screen for every moment of the day
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Log it in one tap
Tap plus, pick, done. A feed, a nap, a diaper or a new food is saved in seconds.
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A solid food guide for their month
Texture stages, suggested foods and the ones to hold off on, matched to your baby’s age.
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Watch them grow
Add weight, height and head circumference and see where they sit on the WHO percentile curve.
How old is your baby?
Month-by-month guides on feeding, sleep and development, grounded in guidance from health organizations.
Log your first entry today
Download RADLE for free and record the next feed or nap with a single tap.