# Hydroo vs Fasting Tracker

The clearest difference is update cadence: Fasting Tracker at every 4 days against Hydroo's fortnightly. Fasting Tracker also leads on device support (3 vs 1) and iOS requirement (15.3 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Hydroo ships an update fortnightly, Fasting Tracker every 4 days. The most recent releases landed on May 16, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | Hydroo | Fasting Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 23 MB | 42 MB |
| Requires iOS | 17.0 | **15.3** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Khawlah Bawazir](https://appshunter.io/developer/1627702695) | [Days Until LTD](https://appshunter.io/developer/1224814198) |

## What reviewers say

### Hydroo

[App page](https://appshunter.io/ios/app/hydroo/id6504790565)

**In-app purchases:** none


### Fasting Tracker

[App page](https://appshunter.io/ios/app/fasting-tracker-fastingai/id6578452948)

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

**In-app purchases:** none


## Frequently asked questions

### Is Hydroo free?

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

### Is Fasting Tracker free?

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

### Do Hydroo or Fasting Tracker have ads?

Neither Hydroo nor Fasting Tracker shows ads.

### Which is updated more often, Hydroo or Fasting Tracker?

Hydroo ships an update fortnightly, and Fasting Tracker every 4 days. Most recently, Hydroo was updated on May 16, 2026 and Fasting Tracker on August 18, 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.*