SleepMatic vs zZZ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SleepMatic
Automatically track your sleep cycles and naps using your Apple Watch. Wake up to detailed sleep analysis, including when you fall asleep and wake up. Log your sleep patterns with notes and hashtags to identify trends and factors affecting your rest.
- Automatic sleep tracking
- All-day and nap tracking
- Tunable detection sensitivity
- Detailed sleep analysis
- Add notes and hashtags
- Manual sleep editing
- HealthKit integration
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Sleep tracking should be effortless. SleepMatic automatically tracks your sleep using your Apple Watch. Simply wear your Watch to bed and wake up to a clear report—without starting a session, setting a sleep window, or remembering to stop tracking. Terms of use: http://www.vimo.co/termsofuse/ Privacy policy: http://www.vimo.co/privacy/ Automatic by design - Detects when you fall asleep and wake up - Tracks nighttime sleep and daytime naps - Works without a predefined sleep schedule - Lets you tune detection sensitivity to fit how you sleep Understand your nights See when you went to bed, fell asleep, woke up, and got out of bed. Review restful and restless periods, heart-rate information, and trends across nights, weeks, and months. Discover what affects your sleep Add notes and hashtags such as #coffee, #exercise, or #lateMeal. Compare your tagged nights over time and identify patterns in your routine. Your data, where you need it SleepMatic integrates with Apple Health and lets you correct recently detected sleep sessions when needed. Just wear your Apple Watch. SleepMatic handles the rest.
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 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
Verdict
The clearest difference is review sentiment: zZZ at 100% against SleepMatic's 48%. zZZ also leads on price (Free vs $1.99) and update cadence (every 2 days vs monthly). SleepMatic's advantage is chart position (#110 vs unranked) and iOS requirement (15.6 vs 17.0). On ads, in-app purchases, monetization model 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
zZZ is free to download; SleepMatic costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SleepMatic ships an update monthly, zZZ every 2 days. The most recent releases landed on November 9, 2026 and November 4, 2026 respectively.
| Parameter | SleepMatic | zZZ |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.4 (8.8K ratings) — better | — |
| Positive reviews | 48.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 8.8K — better | — |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #110 — better | — |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 41 MB |
| Age rating | 4+ | 12+ |
| Developer | Vimo Labs Inc. | 子龙 郭 |
Customer experience
SleepMatic
zZZ
Bugs and requests
SleepMatic
Reported bugs
3 issues- App crashes when trying to view previous sleep data
- Inconsistent sleep tracking, sometimes registers inactivity as sleep
- Fails to sync sleep data to Apple Health on some occasions
Requested features
4 requests- Add ability to manually edit sleep data
- Improve trend and history visualization
- Implement automatic bedtime/wake up detection
- Provide more customization options
zZZ
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SleepMatic
No in-app purchases
zZZ
No in-app purchases









