# WaterFast vs The Fast

The clearest difference is in-app purchases: The Fast at none against WaterFast's 2. The Fast also leads on update cadence (daily vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. WaterFast sells 2 in-app purchases, starting at $9.99 per year. The Fast asks for nothing beyond the download.

WaterFast ships an update weekly, The Fast daily. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | WaterFast | The Fast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/waterfast-if-fasting-timer/id6787013484/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Daily** |
| Monetization | Freemium | — |
| Size | 3 MB | 31 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [LUIS ORLANDO LAZO GONZALEZ](https://appshunter.io/developer/1896012382) | [Prime Adventure LLC](https://appshunter.io/developer/6803535656) |

## What reviewers say

### WaterFast

[App page](https://appshunter.io/ios/app/waterfast-if-fasting-timer/id6787013484)

This app provides a synchronized intermittent fasting timer designed for seamless use across your iPhone and Apple Watch. It offers detailed insights into fasting zones and hydration tracking, with a focus on privacy and a user-friendly experience.

**Highlights:** Synchronized iPhone and Apple Watch timer, Fasting zone insights, Hydration tracking, Multiple fasting plans, Streak calendar, Data export

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WaterFast PRO Yearly | $9.99 | per year |
| WaterFast PRO Lifetime | $24.99 | one-time |


### The Fast

[App page](https://appshunter.io/ios/app/the-fast-fasting-timer/id6813492448)

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

**In-app purchases:** none


## Frequently asked questions

### Is WaterFast free?

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

### Is The Fast free?

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

### Do WaterFast or The Fast have ads?

Neither WaterFast nor The Fast shows ads.

### Which is updated more often, WaterFast or The Fast?

WaterFast ships an update weekly, and The Fast daily. Most recently, WaterFast was updated on October 6, 2026 and The Fast on October 11, 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.*