# Sleep Tracker vs Thin4Fun

The clearest difference is rating: Thin4Fun at 5.0 against Sleep Tracker's 4.5. Thin4Fun also leads on in-app purchases (none vs 3) and ads (none vs shown). Sleep Tracker's advantage is update cadence (every 2 weeks vs every 26 months) and ratings volume (77 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Sleep Tracker sells 3 in-app purchases, starting at $4.99 per 7 days. Thin4Fun asks for nothing beyond the download.

Thin4Fun holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Sleep Tracker has 77 ratings behind it against 1, so its average is the more settled of the two.

Sleep Tracker ships an update every 2 weeks, Thin4Fun every 26 months. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Sleep Tracker | Thin4Fun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (77 ratings)](https://appshunter.io/ios/app/sleep-tracker-top-sleep/id6468921020/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thin4fun/id6593659053/reviews)** |
| Number of ratings | **77** | 1 |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 26 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 112 MB | 89 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 9+ | 12+ |
| Developer | [Xiaoyao Apps](https://appshunter.io/developer/1706954979) | [Thin4Fun LLC](https://appshunter.io/developer/1760214807) |

## What reviewers say

### Sleep Tracker

[App page](https://appshunter.io/ios/app/sleep-tracker-top-sleep/id6468921020)

This app helps you improve your sleep with white noise, guided stories, and breathing exercises. Track your sleep duration and quality with detailed reports to understand your rest patterns and make informed adjustments for a healthier lifestyle.

**Highlights:** Customizable white noise mixes, Library of sleeping stories, Sleep duration and quality tracking, Detailed sleep reports and trends, Guided breathing exercises, AI dream analysis

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Top Sleep Premium | $4.99 | per 7 days |
| Top Sleep Premium | $24.99 | per year |
| Top Sleep Premium | $49.99 | per year |


### Thin4Fun

[App page](https://appshunter.io/ios/app/thin4fun/id6593659053)

This app helps you achieve your weight loss goals and live a healthier life. It provides access to medical professionals, educational resources, and a supportive community to make your journey enjoyable.

**Highlights:** Weight loss guidance, Access to medical professionals, Educational resources, Community support, Healthier lifestyle promotion

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Tracker free?

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

### Is Thin4Fun free?

Thin4Fun is free to download, with no in-app purchases.

### Which has better reviews, Sleep Tracker or Thin4Fun?

Thin4Fun is rated higher. Sleep Tracker averages 4.5 out of 5 from 77 ratings, while Thin4Fun averages 5.0 from 1 ratings.

### Do Sleep Tracker or Thin4Fun have ads?

Sleep Tracker shows ads; Thin4Fun does not.

### Which is updated more often, Sleep Tracker or Thin4Fun?

Sleep Tracker ships an update every 2 weeks, and Thin4Fun every 26 months. Most recently, Sleep Tracker was updated on October 15, 2026 and Thin4Fun on October 12, 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.*