# Water Tracker vs Hydrium

The clearest difference is iOS requirement: Water Tracker at 15.1 against Hydrium's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Water Tracker sells 2 in-app purchases, starting at $3.99 per month and Hydrium sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Water Tracker ships an update weekly, Hydrium every 4 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Water Tracker | Hydrium |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Size | 68 MB | 9 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Iaroslav Morgunov](https://appshunter.io/developer/1637341175) | [Christophe Fromage](https://appshunter.io/developer/6816162518) |

## What reviewers say

### Water Tracker

[App page](https://appshunter.io/ios/app/water-tracker-water-goose/id6807391906)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| Water Goose Plus, Lifetime | $9.99 | one-time |


### Hydrium

[App page](https://appshunter.io/ios/app/hydrium/id6816415433)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Hydrium Plus | $2.99 | one-time |


## Frequently asked questions

### Is Water Tracker free?

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

### Is Hydrium free?

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

### Do Water Tracker or Hydrium have ads?

Neither Water Tracker nor Hydrium shows ads.

### Which is updated more often, Water Tracker or Hydrium?

Water Tracker ships an update weekly, and Hydrium every 4 days. Most recently, Water Tracker was updated on October 29, 2026 and Hydrium on October 31, 2026.

---

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