How Napbun works

Napbun is an iPhone app for parents of babies aged 4 to 24 months. In the evening it walks you through your own bedtime routine. In the night, Night Help is one tap away. In the morning it asks one question. And when you're ready, it lets you try one change and see what it did for your baby's nights, measured against your baby's own usual nights.

Napbun doesn't diagnose, and it doesn't replace your pediatrician.

At bedtime: Ready for Sleep

Ready for Sleep is your own bedtime routine, in your own order, such as dim lights, feed, pajamas and diaper, cuddle. You can tick steps as you go, or not. On tired nights, "Keep it simple" keeps only the familiar last steps. Every routine ends with the same safe sleep card: on the back, in an empty, flat crib or bassinet.

When you tap "Start bedtime", Today switches to the night view, and, if you turn it on, Night Help can sit on your Lock Screen until morning.

At 3 a.m.: Night Help

When your baby wakes in the night, open Night Help with one tap from Today or your Lock Screen. You don't need to set anything up first. It shows three steps:

Check your baby is safe.
Comfort the way you usually do.
Feed if hungry.

If the crying goes on, "Still crying after trying?" opens a short checklist, such as diaper, too warm or too cold, hunger, a hair wrapped around a finger or toe, and keeping the room dark and quiet. If you need a break, it's OK to put your baby down safely in the crib and step away for 10 to 15 minutes.

Night wakings are common. Napbun keeps the night screen dark, with no numbers to read.

When to call for help

Call your local emergency number (911 in the US) right away if your baby stops breathing, is struggling to breathe, turns blue or gray, is limp or hard to wake, or has a seizure.

If your baby is under 3 months and has a temperature of 100.4 °F (38 °C) or higher, call your pediatrician right away.

Source: American Academy of Pediatrics (HealthyChildren.org).

In the morning: one question

Napbun asks "How manageable was last night for you?" with three tiles: Hard, In between and Manageable. It's just for you. There are no scores and no streaks. Logging naps and nights is optional, and each takes one tap.

Try one change and see what it did (from 4 months)

Babies differ, and Napbun can't tell you in advance which change will help yours, so it doesn't guess. It lets you try one change and compares those nights with your baby's own usual nights.

Pick one change. For example, an earlier bedtime, the same wake-up time every day, or a darker room. Each change shows how much research is behind it: "Tested in a randomized trial", "Some studies", or "Common practice".
Log 7 usual nights. At least 5 of them need to count.
Try the change for 10 or 14 nights. The first 2 nights are a warm-up and don't count.
Answer one tap each morning. Nights without an answer aren't counted. If your baby was unwell, had a vaccine or you were traveling, leave that night out so the result stays fair.
Read "What changed". The result is one of: nights got better, no clear effect, nights got harder, or not conclusive yet.

The rule for "better" is set before you start. For example, "better" can mean half a wake-up fewer a night, or falling asleep 10 minutes faster, and at least 70% of counted nights beating your baby's usual. This is Napbun's own rule, not a medical standard, and it isn't a promise. The result shows what happened, not why.

Crying is your choice. Setup asks how much crying is OK for you, including "No crying, please". For babies under 6 months (adjusted age), Napbun leaves out crying-based methods such as timed check-ins. Changes stay closed for babies under 4 months, because sleep shifts a lot before then.

Safe sleep, every sleep

Napbun's safe sleep reminders follow the American Academy of Pediatrics (AAP) 2022 recommendations:

Place your baby on their back for every sleep, naps and nights, until their first birthday.
Use a firm, flat sleep surface, such as a crib or bassinet with a fitted sheet. Keep pillows, blankets, bumpers and toys out of it.
Share a room, not a bed, for at least the first 6 months.
If your baby falls asleep in a car seat, stroller, swing or carrier, move them to a firm, flat surface on their back as soon as is safe and practical.
Dress your baby in no more than one layer more than you would wear, with no hat indoors.
Stop swaddling once your baby starts trying to roll over.

Sources: Moon RY et al., Sleep-Related Infant Deaths: Updated 2022 Recommendations, Pediatrics 2022;150(1):e2022057990; AAP, A Parent's Guide to Safe Sleep (HealthyChildren.org).

Napbun's 6 calming sounds have a timer and can't go above 60% of full volume. Keep the phone or speaker as far from the crib as you can, on the lowest volume.

Source: Hugh SC et al., Infant Sleep Machines and Hazardous Sound Pressure Levels, Pediatrics 2014;133(4).

What Napbun doesn't do

It doesn't diagnose or treat anything, and it doesn't replace your pediatrician.
It doesn't predict nap times or bedtimes, and it doesn't promise your baby will sleep through the night.
It isn't a baby monitor and doesn't track breathing.
It doesn't ask you to make an account, and it has no ads.

Napbun at a glance

App: Napbun: Baby Sleep Tracker
For: Parents of babies aged 4 to 24 months. Routine, Night Help, safe sleep reminders and sounds also work for younger babies.
Device: iPhone, iOS 26 or later
Availability: Coming soon to the App Store
Price model: Free to download and use. Napbun Plus is an optional monthly or yearly subscription; the price for your country is shown in the app before you buy.
Your data: The sleep log stays on your devices and in your own iCloud. Anonymous usage statistics only if you say yes. Privacy Policy
Publisher: Cuong Do, individual developer
Help: Support · support@napbun.com

Last reviewed 29 October 2026.