Comparison

zZz vs zZZ

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

zZz

Easily log your sleep with a single tap using home or lock screen widgets. Track time in bed, awake time, and actual sleep duration, syncing data with Apple Health for insightful analysis.

Highlights
  • One-tap sleep logging
  • Home and lock screen widgets
  • Tracks time in bed, awake, and sleep
  • Syncs with Apple Health
  • Siri and Shortcuts integration
Read full description

One Tap and your sleep schedule is tracked. Add a small widget to your home or lock screen, tap it before going to bed and after waking up and your sleep is tracked. It doesn't get any easier than this. Widgets: • Go to bed • I just woke up • Used to track your sleep as easy as possible Shortcuts & Siri: • Go to bed • I just woke up • Used to track your sleep as easy as possible via Siri, Shortcuts or Automations • Activate in the zZz settings Your time in bed, time awake (the duration before you fall asleep) and your actual sleeping time is saved to Apple Health. The same data is also read from Apple Health to give you great insights into your sleeping schedules.

About

zZZ

This app analyzes your sleep patterns using data from your Apple Watch and Apple Health. It provides detailed sleep stage diagrams, trends, and insights to help you understand and improve your sleep quality. Features include tracking sleep history, heart rate, and respiratory rate.

Highlights
  • Automatic sleep detection with Apple Watch
  • Detailed sleep stage analysis (Awake, REM, Core, Deep)
  • Sleep history tracking (Day, Week, Month, Custom)
  • Monitoring of heart rate and respiratory rate during sleep
  • Sleep quality rating and improvement suggestions
  • Watch app support
  • Privacy-focused data storage
Features
Read full description

zZZ - Sleep Tracker Sleep better with zZZ, your smart sleep assistant. We can analyze your sleep data automatically using your Apple Watch. We using sleep data with the Apple Health app on iPhone empowers you to better manage your sleep. Explore trends about your sleep and compare your sleep quality with many Apple Health metrics that affect sleep. Join us that have discovered the life-changing benefits of great sleep! Track your sleep - Wearing your Apple Watch during sleep. We will automatically detect and analyze your sleep. Analysis your sleep - Detailed sleep stage diagram (Awake, REM, Core Sleep, Deep Sleep) and sleep rate. - Show the percentage & duration of that More Sleep Info - Asleep & Awake time - Explore your sleep history with Day, Week, Month, and Custom Date - Sleeping wrist temperature, Sleeping heartbeat rate, Respiratory rate - Discover all aspects of your sleep Sleep Quality - Analyze your sleep and rate that.Find the bad days or nice dream days - Help you to improve your sleep Setting - Theme Setting - Widget - Notification - More App Icons - Share with friends Watch App - You can also use the app in your watch. Privacy by Design - We uses Apple’s HealthKit API which reads and writes data directly on your device only, and all of your data is stored locally, or on other devices which you enabled iCloud syncing. FINALLY, Wish you have a good night~

Screenshots

zZz4 screens
zZZ4 screens

Verdict

The call

The clearest difference is review sentiment: zZZ at 100% against zZz's 0%. zZZ also leads on in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. zZz sells 1 one-off in-app purchase. zZZ asks for nothing beyond the download.

UpkeepUpdate frequency

zZz ships an update every 4 days, zZZ every 2 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
zZz versus zZZ: the parameters behind the verdict, then further details
ParameterzZzzZZ
PriceFreeFree
Rating2.9 (11 ratings) — better—
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings11 — better—
Update frequencyEvery 4 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS16.0 — better17.0
Further details — not scored
Size6 MB41 MB
Age rating4+12+
DeveloperFlorian Schweizer子龙 郭

Customer experience

zZz

All ratings11 ratings
Positive45.5%
Neutral0.0%
Negative54.5%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

zZZ

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

zZz

One-time1
  • Pro Tier$0.99
None

zZZ

No in-app purchases

Questions

Is zZz free?
zZz is free to download, with in-app purchases available.
Is zZZ free?
zZZ is free to download, with no in-app purchases.
Do zZz or zZZ have ads?
Neither zZz nor zZZ shows ads.
Which is updated more often, zZz or zZZ?
zZz ships an update every 4 days, and zZZ every 2 days. Most recently, zZz was updated on November 3, 2026 and zZZ on November 4, 2026.

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