# Fast36 vs Waterfaster

The clearest difference is device support: Fast36 at 3 against Waterfaster's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Fast36 sells 2 in-app purchases, starting at $14.99 per month and Waterfaster sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Fast36 | Waterfaster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 11 days |
| Size | 7 MB | 59 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [AKN Technologies FZ-LLC](https://appshunter.io/developer/1872738914) | [AMIT Solutions](https://appshunter.io/developer/1892726088) |

## What reviewers say

### Fast36

[App page](https://appshunter.io/ios/app/fast36/id6758402027)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fast36 Pro - Monthly | $14.99 | per month |
| Fast36 Pro - Yearly | $99.99 | per year |


### Waterfaster

[App page](https://appshunter.io/ios/app/waterfaster-fasting-tracker/id6762065095)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Waterfaster+ | $3.99 | per 7 days |
| Waterfaster+ | $44.99 | per year |
| Lifetime | $89.99 | one-time |


## Frequently asked questions

### Is Fast36 free?

Fast36 is free to download, with in-app purchases available.

### Is Waterfaster free?

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

### Do Fast36 or Waterfaster have ads?

Neither Fast36 nor Waterfaster shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*