# WaterFast vs Faast

The clearest difference is in-app purchases: Faast at none against WaterFast's 2. Faast also leads on update cadence (every 2 days vs weekly). WaterFast's advantage is iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

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

WaterFast ships an update weekly, Faast every 2 days. The most recent releases landed on September 19, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | WaterFast | Faast |
| --- | --- | --- |
| 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 | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 3 MB | 5 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LUIS ORLANDO LAZO GONZALEZ](https://appshunter.io/developer/1896012382) | [Loan RIVIERE](https://appshunter.io/developer/1843899230) |

## 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 |


### Faast

[App page](https://appshunter.io/ios/app/faast-fasting-timer/id6787727897)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WaterFast free?

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

### Is Faast free?

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

### Do WaterFast or Faast have ads?

Neither WaterFast nor Faast shows ads.

### Which is updated more often, WaterFast or Faast?

WaterFast ships an update weekly, and Faast every 2 days. Most recently, WaterFast was updated on September 19, 2026 and Faast on September 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.*