Nemudoki - Baby Sleep Timing

Know when to start bedtime

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Thirty minutes. An hour. Still not asleep. The reason may be when you start. A baby who stays awake too long becomes overtired and fights sleep even harder — and starting too early doesn't work either. Nemudoki uses your baby's age and your own records to show when the next sleep window is likely to open. Recording takes one tap: asleep, or awake. Open the app and today's sleep is already there. ● One tap to record Tap "asleep" and "awake." That's all. There are no forms to fill in. The home screen shows today's sleep and what's predicted next. ● Know before it's too late A notification arrives before naps and bedtime. If you've forgotten to record something, Nemudoki lets you know quietly. ● It follows your baby's rhythm It starts from what's typical for your baby's age, then adjusts as your records build up. ● Look back See how total sleep, wake times, and bedtimes have shifted, week by week or month by month. You can go back through past periods to trace how the rhythm has changed. ● Sounds for settling Rain, waves, a campfire, a heartbeat, womb sounds, and many more. ● Your records stay on your device No account is required. Your child's sleep records never leave your phone. ● Who it's for Children from newborn to around three years old. Predictions don't appear before four months, since sleep rhythms haven't settled yet — recording and the sleep history are still available. ● Premium All features are free for 14 days from install, with no purchase required. Monthly and yearly subscriptions are available; prices are shown in the app. Recording, sleep history, multiple children, and reminders for missed records remain free after the trial. Premium adds the next sleep prediction, prediction-based notifications, the summary screen, and every settling sound. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel anytime in your App Store settings. Nemudoki is not a medical device. Times shown are estimates. Talk to a doctor about your child's health. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Nemudoki Terms of Service: https://nemudoki.com/en/terms Privacy Policy: https://nemudoki.com/en/privacy

Ratings & Reviews

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The developer, Jin Okawa, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Jin Okawa
Size
  • 25.3 MB
Category
  • Health & Fitness
Compatibility
Requires iOS 26.5 or later.
  • iPhone
    Requires iOS 26.5 or later.
  • Mac
    Requires macOS 26.5 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.5 or later.
Languages
English and 2 more
  • English, Japanese, Korean
Age Rating
9+
In-App Purchases
Yes
Copyright
  • © 2026 Nemudoki
  • Developer Website
  • Privacy Policy