myCircadianClock vs SleepOn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
myCircadianClock
This app aids research studies by tracking diet, exercise, and sleep patterns to understand their impact on health. It allows users to log food intake, sleep times, physical activity, and health metrics, with medication reminders and HealthKit integration.
- Log food and drink intake with camera
- Record sleep times
- Log physical activity
- Monitor health parameters
- Medication reminders
- Integrates with HealthKit
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This app is for use in research studies examining how diet, exercise and sleep affect health and healing. Our body contains circadian (circa – approximately and dian – day) or 24 h clocks that determines the time to sleep, feel hungry or get ready for physical activity. Research studies run in different locations are trying to understand the interaction between “how much” and “when” we sleep, eat or exercise for better health. You need an activation code from these research studies to download and use the app. Following are the key features: - Camera function to snap picture of everything you eat or drink - Sleep tab to record time to bed and time of waking up - Exercise tab to log physical activity - Personalized food menu - Health tab to log and monitor health parameters - Medication reminders - Feedback with the research coordinator - Integrated healthkit framework to track your health information.
SleepOn
This system uses a smart ring and an app to monitor your sleep health. It collects biological data to screen for sleep issues and provides detailed reports. The app helps you track long-term sleep patterns and offers risk warnings for potential health concerns.
- Real-time heart rate and oxygen monitoring
- Professional daily sleep reports
- Sleep stages and AHI reporting
- Sleep activity and debt tracking
- Family and friends data sharing
- Bluetooth connectivity and firmware updates
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SLEEPON is a home sleep testing system including a sleep ring with APPs. SLEEPON uses sleepFit™ algorithm to obtain accurate biological data through sleep ring and APP . SLEEPON screens sleep health issues and help you establish long-term sleep data through sleepFit™ algorithm for risk warning. SLEEPON is suitable for people of all ages, especially for middle-aged and senior people, executives, patients with chronic cardiovascular diseases, obese people and special working groups such as drivers. It is a guardian of your family's sleep health. The main features of ver 2.0: 1. Real-time data monitoring: Heart Rate/Oxygen Level, etc. 2. Professional daily sleep reports 3. Minute Data Report 3. Family and Friends Data Sharing 4. Sleep stages report 5. AHI report 6. Sleep activity and sleep debt report 7. Sleep Diary 8. Night Mode 9. Three font sizes selection 10. Bluetooth hardware connection and management, including firmware update over the air. ------------------------------------------- [Apple Health] Tip: This app supports Apple's health applications.Your Heart Rate, Oxygen Level, and sleep data will synchronize to the health center after authorization.
Screenshots
Verdict
The clearest difference is rating: SleepOn at 3.0 against myCircadianClock's 2.3. SleepOn also leads on update cadence (every 9 days vs monthly) and iOS requirement (9.0 vs 15.6). On price, review sentiment, ratings volume and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SleepOn holds the better App Store score, 3.0 against 2.3. Both are backed by a comparable volume of ratings — 251 and 181 respectively. Written reviews point the same way: 19% of myCircadianClock's written reviews are positive against 21% of SleepOn's.
myCircadianClock ships an update monthly, SleepOn every 9 days. The most recent releases landed on August 29, 2026 and July 18, 2026 respectively.
| Parameter | myCircadianClock | SleepOn |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (251 ratings) | 3.0 (181 ratings) — better |
| Positive reviews | 19.1% of reviews | 21.5% of reviews — better |
| Number of ratings | 251 — better | 181 |
| Update frequency | Monthly | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 56 MB | 128 MB |
| Age rating | 4+ | 17+ |
| Developer | THE SALK INSTITUTE FOR BIOLOGICAL STUDIES, SAN DIEGO, CALIFORNIA | Shenzhen Sleepon Technology Co., Ltd. |
Customer experience
myCircadianClock
SleepOn
User reviews
myCircadianClock
From 251 App Store ratingsWhat we love
- 🚀 Easy to use
- 💡 Contributes to research
- 👍 Helpful for tracking health
- 🚀 Simple and effective
Room to improve
- 🐛 Buggy and glitchy
- 🐛 Crashes frequently
- 🐛 Data loss issues
- 🐛 Slow and unresponsive
- 🐛 Clunky and unintuitive UI
SleepOn
From 181 App Store ratingsWhat we love
- 🚀 Detailed sleep data
- 👍 Useful sleep tracking features
- 🔒 Secure and reliable
- 💡 Innovative sleep monitoring device
Room to improve
- 🐛 Inaccurate sleep stage detection
- 🔋 Battery life issues
- 🔍 Poor customer support
- 🔍 Inconsistent data recording
Bugs and requests
myCircadianClock
Reported bugs
5 issues- Login/registration issues
- Incorrect sleep time recording
- Inability to log food/activity retrospectively
- Pending data not uploading
- Notification issues
Requested features
5 requests- Ability to edit/delete entries
- Better data syncing and backup
- Integration with Apple Health
- More customization options
- Improved sleep tracking
SleepOn
Reported bugs
3 issues- App crashes after firmware updates
- Bluetooth connectivity problems
- Data sync failures
Requested features
3 requests- Multiple alarm options
- Improved data visualization
- Better integration with health apps
In-app purchases
myCircadianClock
No in-app purchases
SleepOn
No in-app purchases









