Baby sleep tracker for iPhone

Know when your baby will sleep next

Lullo forecasts the next nap and bedtime from your baby's age and your own logs, so you can stop guessing and start winding down at the right moment.

Free to download No ads From birth to 24 months
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Nap 3 in 1h 34mabout 2:54 to 3:58 PM
Lullo's Today screen: a day ring around a sleeping baby, with a countdown to the next nap
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Forecast in rhythm90% confidence
๐ŸŒ™ Sleep forecast ๐Ÿ‘† One-tap tracking ๐ŸŽง 19 sleep sounds ๐Ÿ“– 8-day Sleep Guide ๐Ÿฆ‰ Luna, an AI sleep helper
How it works

A day plan that follows your baby

Short naps, long bedtimes, 3 a.m. wake-ups. Lullo turns what you log into a plan that fits your baby's age and their own rhythm, and keeps adjusting as they grow.

1

Tell Lullo about your baby

Lullo starts from the wake windows, nap count and bedtime range that are typical for your baby's age.

2

Log sleep with one button

Hold a single button when your baby falls asleep and again when they wake. Feeds and diapers go on the same timeline.

3

Follow the forecast

See the next sleep window and the whole day on one ring. Every nap moves the next one: a short nap brings the next sleep closer.

Sleep forecast

A forecast that learns your baby

The more you log, the closer the plan follows your baby's own rhythm. Lullo shows how much of today's forecast already comes from your baby rather than from age norms.

  • โœ“ Next nap and bedtime on the home screen
  • โœ“ A confidence score that grows from Learning to In rhythm
  • โœ“ Skip a nap and the rest of the day replans itself
  • โœ“ A reminder before the next sleep window opens
Forecast confidence screen showing 90%, in rhythm, with seven of seven days tracked
Tracking

Sleep, feeds and diapers in a tap

One simple timeline for the whole day, quick enough to use with a baby on your arm.

  • โœ“ Naps, bedtime, wake-ups and night wakings
  • โœ“ Nursing, bottles, pumping and solids
  • โœ“ Diapers, temperature and medicine
  • โœ“ Time since the last feed or change at a glance
Add a log sheet with buttons for nap, bedtime, bottle feed, nursing, pumping, solids, diaper change, temperature and medicine
Luna

Ask Luna, day or night

Luna is an AI sleep helper that already knows your baby's age and logs, so you don't have to explain the whole week at 3 a.m.

  • โœ“ Answers about naps, nights and feeds that use your own data
  • โœ“ Points you to the Sleep Guide lesson that explains why
  • โœ“ Flags symptoms that need a doctor instead of guessing
  • โœ“ Luna is not a doctor and does not replace your pediatrician
A chat with Luna answering why the baby wakes at night, with a night wakings card and a lesson link
Sleep sounds

19 soothing sounds for sleep

White noise, rain, heartbeat and lullabies, made right on your phone, so they play without a connection.

  • โœ“ A sleep timer from 15 minutes to an hour and a half
  • โœ“ A gentle fade-out instead of a sudden stop
  • โœ“ Keeps playing with the screen locked
Rain sound playing with a 30 minute sleep timer and a volume slider
Also inside

Everything around better sleep

The forecast is the centre. These are the things that make it easier to act on.

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Lullo Sleep Guide

An 8-day course of short lessons on how baby sleep works: wake windows, sleepy cues, safe sleep, routines and gentle settling. Day 1 is free.

Lullo Sleep Guide lesson list
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Trends

Clear charts of total sleep, naps, nights, awake time, feeds and diapers, by day or by week.

Trends and insights screen with daily sleep averages
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Shared with caregivers

Invite a partner, grandparent or nanny so everyone sees the same plan and the same logs.

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Widgets and Live Activity

The next nap on your Home Screen and Lock Screen, without opening the app.

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Moments

Turn a photo into a milestone sticker, made on your phone, to keep and share.

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Six languages

English, Spanish, French, Portuguese, Russian and Chinese.

Private by design

Your family's logs stay yours

Lullo has no ads and no advertising trackers. Your baby's data is there to build the forecast and to sync between the caregivers you invite.

Read the privacy policy
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Never soldWe do not sell your data or your baby's data to anyone.
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Made on your phoneSleep sounds and Moments stickers are created on the device.
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You're in controlDelete your account and its data at any time in Settings.
Pricing

Free to start. Unlimited when it helps.

Sleep tracking and the forecast are free. Lullo Unlimited opens everything else.

Free

$0

The core of Lullo, for as long as you like.

  • โœ“ Sleep tracking with one button
  • โœ“ Nap and bedtime forecast
  • โœ“ Day 1 of the Sleep Guide
  • โœ“ A starter set of sleep sounds
  • โœ“ A few questions for Luna
Download free
Free trial available

Lullo Unlimited

Everything

Monthly, quarterly or yearly.

  • โœ“ Tracking for feeds, diapers and health
  • โœ“ All 19 sleep sounds with the sleep timer
  • โœ“ The full 8-day Sleep Guide
  • โœ“ Every Trends chart
  • โœ“ More of Luna, at any hour
  • โœ“ A day planned around your preferred bedtime
Try Lullo Unlimited

Prices and free-trial terms are shown in the app before you buy, in your local currency. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and can be managed in your App Store account settings.

FAQ

Questions, answered

How does the sleep forecast work?

Lullo starts from the wake windows, number of naps and bedtime range that are typical for your baby's age. As you log, it pulls those numbers toward your baby's own rhythm, and every nap during the day moves the next one. A confidence score shows how far along it is: Learning in the first days, Adjusting after that, and In rhythm once it has about a week of logs.

What ages is Lullo for?

From birth to 24 months. In the first two months, when sleep is still irregular, Lullo shows the next sleep window; the full-day forecast starts at around two months. You can also set Lullo up before the birth with a due date.

Do I need any extra hardware?

No. Lullo works with just your iPhone. There are no monitors, wearables or sensors to buy.

Can my partner use it too?

Yes. Invite another caregiver with a code and you both see the same forecast and the same logs, each on your own phone.

Is Luna a substitute for a doctor?

No. Luna is an AI helper and can be wrong. Lullo offers general information about baby sleep and is not medical advice. If you are worried about your baby's health, contact your pediatrician or emergency services.

How much does Lullo Unlimited cost?

Lullo is free to download, and sleep tracking with the forecast stays free. Lullo Unlimited is an auto-renewing subscription available monthly, quarterly or yearly. The price for your region and any free trial are shown in the app before you confirm.

Is my data private?

Your data is used to run the app for you and the caregivers you invite. It is never sold and Lullo has no ads. You can delete your account and its data in Settings. The Privacy Policy has the detail.

I had Lullaby AI. Is this the same app?

Yes. Lullaby AI is now Lullo. The app was rebuilt around one question, when will my baby sleep next, and cry analysis is no longer part of it.

Lullo app icon: a sleeping owl on a crescent moon

Calmer days start with the next nap

Download Lullo, log today's sleep, and see the first forecast for your baby.

Free to download ยท Requires iOS 17 or later