# Sleep Diary App vs Sleep Cycle Simple Calculator

The clearest difference is in-app purchases: Sleep Cycle Simple Calculator at none against Sleep Diary App's 3. Sleep Cycle Simple Calculator also leads on update cadence (every 2 days vs fortnightly). Sleep Diary App's advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Sleep Diary App sells 3 one-off in-app purchases. Sleep Cycle Simple Calculator asks for nothing beyond the download.

Sleep Diary App ships an update fortnightly, Sleep Cycle Simple Calculator every 2 days. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sleep Diary App | Sleep Cycle Simple Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (24 ratings)](https://appshunter.io/ios/app/sleep-diary-app/id964733439/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 59.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 31 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Ivanov](https://appshunter.io/developer/734258593) | [Marius Kuzminskas](https://appshunter.io/developer/1859767355) |

## What reviewers say

### Sleep Diary App

[App page](https://appshunter.io/ios/app/sleep-diary-app/id964733439)

Easily log your sleep durations to analyze your health and become more conscious of your sleep patterns. This app integrates with Apple Health to share your sleep data seamlessly. iPhone 6 users can also track atmospheric pressure changes during sleep.

**Highlights:** Log sleep durations, Analyze sleep health, Connect with Apple Health, Share sleep data, Monitor atmospheric pressure (iPhone 6)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Apple | $0.99 | one-time |
| Salad | $2.99 | one-time |
| Bag of healthy food | $9.99 | one-time |


### Sleep Cycle Simple Calculator

[App page](https://appshunter.io/ios/app/sleep-cycle-simple-calculator/id6756280217)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Diary App free?

Sleep Diary App is free to download, with in-app purchases available.

### Is Sleep Cycle Simple Calculator free?

Sleep Cycle Simple Calculator is free to download, with no in-app purchases.

### Do Sleep Diary App or Sleep Cycle Simple Calculator have ads?

Neither Sleep Diary App nor Sleep Cycle Simple Calculator shows ads.

### Which is updated more often, Sleep Diary App or Sleep Cycle Simple Calculator?

Sleep Diary App ships an update fortnightly, and Sleep Cycle Simple Calculator every 2 days. Most recently, Sleep Diary App was updated on November 1, 2026 and Sleep Cycle Simple Calculator on October 25, 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.*