Sleep guides & tools
Interactive calculators powered by the same engine as the app — not marketing approximations — plus guides written by a parent who logged every nap.
Free toolWake Window Calculator: Exact Awake Times by Age
Enter your baby's age and morning wake-up time — get today's nap times and tonight's bedtime, from 4 months to 3+ years. Plus the full reference table and how to tell when the window is wrong for your baby.
Free toolBaby Jet Lag Calculator: A Day-by-Day Plan to Shift Your Baby's Schedule
Pick your home and destination time zones and get a day-by-day bedtime plan — about one hour of shift per day. Built during 34 days in Italy with a toddler, six time zones from home.
Free toolBaby Sleep Debt Calculator: Last 24 Hours by Age
Enter last night's sleep and today's nap total to see whether your baby is behind their age-based 24-hour sleep target, plus a conservative bedtime recovery suggestion.
GuideBaby Sleep Tips That Actually Move the Needle
Ranked by impact, not listicle order: the last wake window, earlier bedtime, real darkness, the pause before rushing in — and the stuff that's mostly noise. From a parent who logged every nap for a year.
GuideCo-Sleeping Until 2 (or Beyond): What's Normal Around the World
Most of the planet shares a bed with their baby — Japan even has a word for it. What co-sleeping cultures get right, what the safety evidence actually says by age, and a gentle plan for transitioning out when you're ready.
More guides coming — night-wake reasons, nap transitions, hunger-or-habit checks. The app already computes all of it from your logs: try it free.