# Hydra vs Creatine Jotter

The clearest difference is in-app purchases: Creatine Jotter at none against Hydra's 2. Hydra's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price and ads there is nothing between them.

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

## The numbers

| Metric | Hydra | Creatine Jotter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Size | 41 MB | 8 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Ryan Creary](https://appshunter.io/developer/1819349085) | [Jack Barrable](https://appshunter.io/developer/1781563118) |

## 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 |


### Creatine Jotter

[App page](https://appshunter.io/ios/app/creatine-jotter-dose-tracker/id6796774452)

**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 Creatine Jotter free?

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

### Do Hydra or Creatine Jotter have ads?

Neither Hydra nor Creatine Jotter shows ads.

---

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