Zzzoo
Sleep tracker & sleep sounds
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Get a 7-day free VIP trial on download.
For the night owls.
water
May it be of help.
And may you sleep healthier.
Download and look back at roughly the past 7 days of sleep — no waiting: your sleep report is right there the moment you open the app.
The app automatically tracks your sleep at night — when you fall asleep, when you wake up and how long you slept — and records it all on a timeline.
Your rating is based on how long you sleep between 9 PM and 9 AM: Lion, Dog, Boar or Owl, your sleep quality at a glance.
No manual steps at all — just put your phone down and sleep. It works without an Apple Watch, and tracks more precisely with one.
Key features:
• Sleep tracking: sleep and wake times plus duration, recorded automatically
• Animal rating: four animals show how you slept at a glance
• Calendar history: every night, every stretch of sleep, laid out clearly
• Home Screen widgets: Sleep Clock, Monthly View, Lion Box, Recent 7 Days, Sleep Brief and more
• Monthly stats: look back over the whole month and find your sleep sweet spot
• Sleep music: a built-in playlist for winding down — tap the vinyl and it plays, with sleep timer
Your sleep data stays on your device and syncs between your devices through iCloud (encrypted by Apple). We never see any of your personal data.
——
Zzzoo © water
Acknowledgments:
Lynn — conversations about sleep and daily rhythms inspired the idea for this app.
Kevin — my work buddy. Your engineering skills always give me so much confidence.
Doudou / Guanguan — the dogs who always sleep sweetly.
Andy Weir — Project Hail Mary sparked my love for engineering and creation.
To all the night owls — water
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Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
more 喜欢这个按睡眠时长划分小动物类型的概念，在小组件上可以很直观看到本月的睡眠情况😌就算是有几次很短暂的睡眠，看到是可爱的猫头鹰好像也不会很焦虑了
Developer Response 不要焦虑，它只是提醒你该好好休息了，“睡眠不是奢侈，而是必需。请允许自己拥有它。”。
喜欢这个按睡眠时长划分小动物类型的概念，在小组件上可以很直观看到本月的睡眠情况😌就算是有几次很短暂的睡眠，看到是可爱的猫头鹰好像也不会很焦虑了
不要焦虑，它只是提醒你该好好休息了，“睡眠不是奢侈，而是必需。请允许自己拥有它。”。
• New name: AnimalSleep is now Zzzoo. Same app, same team
• New lyrics — follow along line by line as the music plays
• New playlist: Secret Grove
1.1.7 2d ago
• New sleep music player – tap the vinyl at the bottom right of the home screen to play
• Supports sleep timer, repeat / single / shuffle playback, AirPlay and lock screen controls
1.1.6 4d ago
· New 「Sleep Brief」 widget — see how long you slept last night and when you fell asleep and woke up, at a glance
· Afternoon naps no longer affect the 「Wake Up」 time — it only shows your main sleep's wake-up time
· 「Monthly View」 widget improvements: fixed 5 rows, even margins, text follows your language setting
· The first day of the week in the calendar and widgets now follows your system setting, matching your device's Calendar.
1.1.5 6d ago
Three new widgets: Sleep Clock, Lion Box, and Recent 7 Days.
1.1.4 Sep 13
· Fixed the Asleep / Up times wrapping when using larger text
· Added "Light up a star" in Settings — light one up if you enjoy the app
1.1.3 Sep 11
· Fixed the daily comments not auto-refreshing at 9:00 AM
· Time is now shown in 24-hour format, unaffected by your system time-format setting
· New sleep reminder: a nightly nudge before bedtime to help you build a steady routine.
1.1.2 Sep 8
What's New:
· New sleep share card: turn last night's sleep report into a beautiful image — save to Photos or share
· Smarter sleep tracking: more complete overnight sleep and "wake-and-return" segments, clearer breakpoints
· Monthly stats polish: better large-screen layout, reach Settings right from the calendar
· Polished details and improved stability
1.1.1 Sep 7
What's New:
• New settings panel for monthly stats: customize early / late bedtime, target sleep duration, and chart style (curve / bar); switch between this month and the last 3 / 7 / 14 days
• AI evaluation updates instantly when you adjust early / late bedtime, matching your schedule
• Early / late bedtime preferences sync across devices
• Smoother comments and stats — settings take effect immediately
1.0.9 Sep 5
What's New:
• Fixed sleep times not matching Apple Health — health data now aligns correctly
• Fixed comment flickering and scroll jumps on cold launch
• More complete stats shown in the early hours
• New text size options — follow your system by default, or choose Standard or Large for clearer, easier-to-read text.
1.0.8 Sep 4
What's New:
• See live sleep progress in the early hours — real-time sleep segments and "No Rating Yet" before the day settles
• Mark misdetected sleep segments as "Not sleep?" and restore them anytime
• Improved daytime sleep detection for more accurate naps
• More reliable data sync — records restore smoothly after reinstall or device change
• Smoother scrolling and page transitions
1.0.7 Sep 2
What's New:
• Lion rating upgrade: 7+ hours of sleep and falling asleep before midnight
• Smarter daily comments: early-night and late-night insights, plus "so close to a Lion" notes
• Timeline improvement: tap a sleep segment to see its start and end times
• Monthly Stats improvement: see the target baseline even before data arrives
• Layout optimized for large-screen devices
• Fixed comment jumping and page-flip ghosting
1.0.6 Sep 1
This update:
• New Monthly plan: subscribe month by month to unlock the widget and monthly statistics
• Upgraded sleep assistant: more varied reviews, plus special holiday and weekend greetings
• Refined the calendar Monthly Stats entry for a clearer experience
• Fixed widget/calendar sync issues and multi-session sleep duration calculation
• Improved home screen scrolling and comment ticker interaction for smoother paging
1.0.5 Aug 31
This update:
• New Monthly Stats: open the calendar to see your average sleep duration, routine, and sleep trends at a glance
• Trend chart upgrade: a target-duration reference line makes changes easier to spot
1.0.4 Aug 30
Fixed a critical issue that could cause a black screen at launch. Startup is now more stable and smooth.
1.0.3 Aug 29
What's New:
• Fixed iCloud sync issues — sleep records now restore properly after switching devices or reinstalling the app
• Improved Data Management page: added sync status display and a manual resync option
1.0.2 Aug 28
• New name: AnimalSleep is now Zzzoo. Same app, same team
• New lyrics — follow along line by line as the music plays
• New playlist: Secret Grove
more Version 1.1.7 2d ago
Data Not Linked to You The following data may be collected but it is not linked to your identity:
