# myCircadianClock vs E

The clearest difference is update cadence: myCircadianClock at monthly against E's every 10 months. E's advantage is iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

myCircadianClock ships an update monthly, E every 10 months. The most recent releases landed on October 5, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | myCircadianClock | E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (251 ratings)](https://appshunter.io/ios/app/mycircadianclock/id982118665/reviews)** | — |
| Number of ratings | **251** | — |
| Positive reviews | 19.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 10 months |
| Monetization | Free | — |
| Size | 56 MB | 29 MB |
| Requires iOS | 15.6 | **11.0** |
| 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) | [Umar Jalil Malik](https://appshunter.io/developer/1699051906) |

## 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


### E

[App page](https://appshunter.io/ios/app/e-docssecure-your-documents/id6452803142)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is myCircadianClock free?

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

### Is E free?

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

### Do myCircadianClock or E have ads?

Neither myCircadianClock nor E shows ads.

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

myCircadianClock ships an update monthly, and E every 10 months. Most recently, myCircadianClock was updated on October 5, 2026 and E on September 26, 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.*