# Hydrelle vs みずたま

The clearest difference is in-app purchases: みずたま at none against Hydrelle's 3. みずたま also leads on ads (none vs shown) and update cadence (every 4 days vs every 3 weeks). Hydrelle's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price there is nothing between them.

Both are free to download. Hydrelle sells 3 in-app purchases, starting at $2.99 per month. みずたま asks for nothing beyond the download.

Hydrelle ships an update every 3 weeks, みずたま every 4 days. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Hydrelle | みずたま |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | — | Free |
| Size | 85 MB | 64 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tomohito Kii](https://appshunter.io/developer/1689523321) | [Hayato Tsuchikawa](https://appshunter.io/developer/1863967283) |

## What reviewers say

### Hydrelle

[App page](https://appshunter.io/ios/app/hydrelle-water-tracker/id6761470806)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $14.99 | per year |
| Lifetime Premium | $29.99 | one-time |


### みずたま

[App page](https://appshunter.io/ios/app/id6765880982)

This app helps you stay hydrated by tracking your water intake with a cute, interactive companion. It gamifies the process with a character that reacts to your progress, making hydration fun and motivating. Enjoy a visually pleasing and minimalist experience focused solely on water consumption.

**Highlights:** Interactive character that reacts to hydration progress, Customizable reminders, Home screen widgets, Daily, weekly, and monthly statistics, Streak tracking, Preset drink registration, Data privacy focused

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

**In-app purchases:** none


## Frequently asked questions

### Is Hydrelle free?

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

### Is みずたま free?

みずたま is free to download, with no in-app purchases.

### Do Hydrelle or みずたま have ads?

Hydrelle shows ads; みずたま does not.

### Which is updated more often, Hydrelle or みずたま?

Hydrelle ships an update every 3 weeks, and みずたま every 4 days. Most recently, Hydrelle was updated on October 31, 2026 and みずたま on October 28, 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.*