# Waterd vs Hydrium

The clearest difference is iOS requirement: Hydrium at 17.0 against Waterd's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Waterd sells 3 in-app purchases, starting at $1.99 per month and Hydrium sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Waterd ships an update every 3 days, Hydrium every 4 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Waterd | Hydrium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/waterd/id6761774902/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | Freemium | — |
| Size | 11 MB | 9 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Wenjie Zhang](https://appshunter.io/developer/1891409645) | [Christophe Fromage](https://appshunter.io/developer/6816162518) |

## What reviewers say

### Waterd

[App page](https://appshunter.io/ios/app/waterd/id6761774902)

This app automatically sets personalized daily water intake goals based on activity and weather, using on-device AI. It offers quick logging via widgets and notifications, with weekly insights for reflection. All data remains private and on your device.

**Highlights:** AI-powered personalized hydration goals, On-device processing for privacy, Quick logging via widgets and notifications, Weekly hydration insights, HealthKit integration, No ads or tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Waterd Premium | $1.99 | per month |
| Waterd Premium | $4.99 | per year |
| Waterd Premium Lifetime | $7.99 | 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 Waterd free?

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

### Is Hydrium free?

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

### Do Waterd or Hydrium have ads?

Neither Waterd nor Hydrium shows ads.

### Which is updated more often, Waterd or Hydrium?

Waterd ships an update every 3 days, and Hydrium every 4 days. Most recently, Waterd was updated on October 31, 2026 and Hydrium on October 31, 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.*