# myCircadianClock vs SleepOn

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.

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.

## The numbers

| Metric | myCircadianClock | SleepOn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (251 ratings)](https://appshunter.io/ios/app/mycircadianclock/id982118665/reviews) | **[3.0 (181 ratings)](https://appshunter.io/ios/app/sleepon/id1385995937/reviews)** |
| Number of ratings | **251** | 181 |
| Positive reviews | 19.1% of reviews | **21.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free | Free |
| Size | 56 MB | 128 MB |
| Requires iOS | 15.6 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [THE SALK INSTITUTE FOR BIOLOGICAL STUDIES, SAN DIEGO, CALIFORNIA](https://appshunter.io/developer/1571953378) | [Shenzhen Sleepon Technology Co., Ltd.](https://appshunter.io/developer/1385995936) |

## What reviewers say

### myCircadianClock

[App page](https://appshunter.io/ios/app/mycircadianclock/id982118665)

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.

**Highlights:** Log food and drink intake with camera, Record sleep times, Log physical activity, Monitor health parameters, Medication reminders, Integrates with HealthKit

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 💡 Contributes to research
- 👍 Helpful for tracking health
- 🚀 Simple and effective

**What reviewers complain about**

- 🐛 Buggy and glitchy
- 🐛 Crashes frequently
- 🐛 Data loss issues
- 🐛 Slow and unresponsive
- 🐛 Clunky and unintuitive UI

**Reported bugs**

- Login/registration issues
- Incorrect sleep time recording
- Inability to log food/activity retrospectively
- Pending data not uploading
- Notification issues

**Requested features**

- Ability to edit/delete entries
- Better data syncing and backup
- Integration with Apple Health
- More customization options
- Improved sleep tracking


### SleepOn

[App page](https://appshunter.io/ios/app/sleepon/id1385995937)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Detailed sleep data
- 👍 Useful sleep tracking features
- 🔒 Secure and reliable
- 💡 Innovative sleep monitoring device

**What reviewers complain about**

- 🐛 Inaccurate sleep stage detection
- 🔋 Battery life issues
- 🔍 Poor customer support
- 🔍 Inconsistent data recording

**Reported bugs**

- App crashes after firmware updates
- Bluetooth connectivity problems
- Data sync failures

**Requested features**

- Multiple alarm options
- Improved data visualization
- Better integration with health apps


## Frequently asked questions

### Is myCircadianClock free?

myCircadianClock is free to download, with no in-app purchases.

### Is SleepOn free?

SleepOn is free to download, with no in-app purchases.

### Which has better reviews, myCircadianClock or SleepOn?

SleepOn is rated higher. myCircadianClock averages 2.3 out of 5 from 251 ratings, while SleepOn averages 3.0 from 181 ratings.

### Do myCircadianClock or SleepOn have ads?

Neither myCircadianClock nor SleepOn shows ads.

### Which is updated more often, myCircadianClock or SleepOn?

myCircadianClock ships an update monthly, and SleepOn every 9 days. Most recently, myCircadianClock was updated on August 29, 2026 and SleepOn on July 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*