# zZZ vs CycleMind

The clearest difference is in-app purchases: zZZ at none against CycleMind's 3. zZZ also leads on update cadence (every 2 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CycleMind sells 3 in-app purchases, starting at $0.99 per month. zZZ asks for nothing beyond the download.

zZZ ships an update every 2 days, CycleMind monthly. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | zZZ | CycleMind |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | Free | — |
| Size | 41 MB | 5 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [子龙 郭](https://appshunter.io/developer/1499776496) | [Yang Jiao](https://appshunter.io/developer/6783337561) |

## What reviewers say

### zZZ

[App page](https://appshunter.io/ios/app/zzz-sleep-tracker/id6476821635)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### CycleMind

[App page](https://appshunter.io/ios/app/cyclemind/id6783337559)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly (Premium) | $0.99 | per month |
| Yearly (Premium) | $7.99 | per year |
| Lifetime (Premium) | $16.99 | one-time |


## Frequently asked questions

### Is zZZ free?

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

### Is CycleMind free?

CycleMind is free to download, with in-app purchases available.

### Do zZZ or CycleMind have ads?

Neither zZZ nor CycleMind shows ads.

### Which is updated more often, zZZ or CycleMind?

zZZ ships an update every 2 days, and CycleMind monthly. Most recently, zZZ was updated on October 6, 2026 and CycleMind on October 15, 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.*