# WaveFast vs Yawn Sleep

The clearest difference is in-app purchases: Yawn Sleep at none against WaveFast's 1. Yawn Sleep also leads on update cadence (every 3 days vs every 3 weeks). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. WaveFast sells 1 one-off in-app purchase. Yawn Sleep asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for WaveFast against 5.0 for Yawn Sleep. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

WaveFast ships an update every 3 weeks, Yawn Sleep every 3 days. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | WaveFast | Yawn Sleep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/wavefast-fasting-tracker/id6764770817/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/yawn-sleep/id6794833808/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free | Free |
| Size | 20 MB | 39 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 9+ | 4+ |
| Developer | [瑞华 张](https://appshunter.io/developer/1608130007) | [Lutz-R. Frank](https://appshunter.io/developer/1826961605) |

## What reviewers say

### WaveFast

[App page](https://appshunter.io/ios/app/wavefast-fasting-tracker/id6764770817)

Track your intermittent fasting with a visually engaging and user-friendly interface. This app offers a one-time purchase, no subscriptions, and prioritizes user privacy by storing all data locally. Stay motivated with fluid animations and smart notifications.

**Highlights:** Mesmerizing fluid wave animation, Dynamic Island & Live Activities integration, History and streak tracking, Customizable water themes, Body status insights, Smart notifications, Privacy-focused local data storage

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WaveFast Pro | $4.99 | one-time |


### Yawn Sleep

[App page](https://appshunter.io/ios/app/yawn-sleep/id6794833808)

This app visualizes your sleep quality through a charming 3D scene and a digital companion that reacts to your Yawn Score. It analyzes sleep duration, efficiency, and restorative stages directly on your device, offering a private and engaging way to understand your rest.

**Highlights:** Sleep data visualization, Personalized 3D scenes, Sleep Companion reactions, On-device data processing, Apple Health integration, Privacy-focused design

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is WaveFast free?

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

### Is Yawn Sleep free?

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

### Which has better reviews, WaveFast or Yawn Sleep?

WaveFast and Yawn Sleep are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do WaveFast or Yawn Sleep have ads?

Neither WaveFast nor Yawn Sleep shows ads.

### Which is updated more often, WaveFast or Yawn Sleep?

WaveFast ships an update every 3 weeks, and Yawn Sleep every 3 days. Most recently, WaveFast was updated on October 19, 2026 and Yawn Sleep 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.*