# Hydra vs HydraFill

The clearest difference is in-app purchases: HydraFill at none against Hydra's 2. Hydra's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Hydra sells 2 in-app purchases, starting at $6.99 per month. HydraFill asks for nothing beyond the download.

## The numbers

| Metric | Hydra | HydraFill |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydrafill-hydration-tracker/id6790350987/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 days |
| Monetization | — | Free with in-app purchases |
| Size | 41 MB | 102 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Ryan Creary](https://appshunter.io/developer/1819349085) | [Parthkumar Saliya](https://appshunter.io/developer/1895160511) |

## What reviewers say

### Hydra

[App page](https://appshunter.io/ios/app/hydra-water-tracker/id6764020000)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hydra Pro Monthly | $6.99 | per month |
| Hydra Pro Annual | $39.99 | per year |


### HydraFill

[App page](https://appshunter.io/ios/app/hydrafill-hydration-tracker/id6790350987)

Visualize your daily water intake with an animated body silhouette that fills up with each logged drink. Track various beverages, set personalized goals, and receive custom reminders to stay hydrated. Share your progress with engaging visualizations.

**Highlights:** Animated body visualization of hydration, Log 18+ drink types with custom icons, Set personalized daily hydration goals, Customizable drink reminders, Build daily streaks and earn badges, Sync with Apple Health, Track caffeine intake, Home screen widget for quick logging

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

**In-app purchases:** none


## Frequently asked questions

### Is Hydra free?

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

### Is HydraFill free?

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

### Do Hydra or HydraFill have ads?

HydraFill shows ads; Hydra does not.

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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.*