# Waterfaster vs Hydra

The clearest difference is in-app purchases: Hydra at none against Waterfaster's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Waterfaster sells 3 in-app purchases, starting at $3.99 per 7 days. Hydra asks for nothing beyond the download.

## The numbers

| Metric | Waterfaster | Hydra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 days | — |
| Size | 59 MB | 23 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [AMIT Solutions](https://appshunter.io/developer/1892726088) | [Obadah Almheidat](https://appshunter.io/developer/6783860344) |

## What reviewers say

### 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 |


### Hydra

[App page](https://appshunter.io/ios/app/hydra/id6783860342)

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

**In-app purchases:** none


## Frequently asked questions

### Is Waterfaster free?

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

### Is Hydra free?

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

### Do Waterfaster or Hydra have ads?

Neither Waterfaster nor Hydra shows ads.

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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.*