Sleepit vs zZZ
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Sleepit
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γIntroductionγ A professional sleep monitoring app. γApp Descriptionγ Sleepit is a professional sleep monitoring app that accurately records users' sleep patterns, including bedtime, wake-up time, sleep duration, deep sleep time, light sleep time, and other data, providing users with comprehensive sleep monitoring services. Based on sleep monitoring, Sleepit also provides sleep quality analysis function. Users can view their own sleep curve and changes in various sleep data trends through the app to understand their own sleep conditions. At the same time, the app will generate a sleep report based on users' sleep data, analyze sleep quality, point out the problems that users have, and provide corresponding health advice to help users improve their sleep quality. In addition, Sleepit also supports writing sleep data into the iPhone's "Health" app. In conclusion, Sleepit is a very practical sleep monitoring app that can help users fully understand their sleep conditions, provide scientific sleep analysis and personalized services, help users improve their sleep quality, and improve their quality of life.
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.
- 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
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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 Appleβs 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
Verdict
The clearest difference is update cadence: zZZ at every 2 days against Sleepit's every 11 days. Sleepit's advantage is iOS requirement (11.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sleepit ships an update every 11 days, zZZ every 2 days. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.
| Parameter | Sleepit | zZZ |
|---|---|---|
| Price | Free | Free |
| Positive reviews | β | 100.0% of reviews |
| Update frequency | Every 11 days | Every 2 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | β | Free |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch β better |
| Requires iOS | 11.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 128 MB | 41 MB |
| Age rating | 17+ | 12+ |
| Developer | Shenzhen Miracle Intelligent Technology Co., LTD | ειΎ ι |
In-app purchases
Sleepit
No in-app purchases
zZZ
No in-app purchases









