# Waterfaster vs Hydra

The clearest difference is update cadence: Waterfaster at every 11 days against Hydra's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Waterfaster sells 3 in-app purchases, starting at $3.99 per 7 days and Hydra sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Waterfaster ships an update every 11 days, Hydra every 3 months. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Waterfaster | Hydra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/waterfaster-fasting-tracker/id6762065095/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 months |
| Monetization | Freemium | — |
| Size | 59 MB | 34 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)

Track intermittent and water fasts with live countdowns on your Lock Screen and widgets. Monitor your body's progress and connect with friends anonymously for support and challenges. Offers various fasting protocols and integrates with Apple Health.

**Highlights:** Live Lock Screen and widget countdowns, Anonymous social fasting with friends, Support for various fasting protocols, Apple Health integration, Hydration and electrolyte guidance, Progress tracking and insights

**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-water-and-diet-tracker/id6783860342)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hydra Premium (Monthly) | $4.99 | per month |
| Hydra Premium (Yearly) | $39.99 | per year |


## 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 in-app purchases available.

### Do Waterfaster or Hydra have ads?

Neither Waterfaster nor Hydra shows ads.

### Which is updated more often, Waterfaster or Hydra?

Waterfaster ships an update every 11 days, and Hydra every 3 months. Most recently, Waterfaster was updated on November 5, 2026 and Hydra on November 10, 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.*