# みずたま vs WaterCoach

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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

みずたま ships an update every 4 days, WaterCoach fortnightly. Both last shipped on October 31, 2026.

## The numbers

| Metric | みずたま | WaterCoach |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Free | — |
| Size | 64 MB | 71 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hayato Tsuchikawa](https://appshunter.io/developer/1863967283) | [Iko Nakari](https://appshunter.io/developer/1476223181) |

## What reviewers say

### 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


### WaterCoach

[App page](https://appshunter.io/ios/app/watercoach/id6777726344)

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

**In-app purchases:** none


## Frequently asked questions

### Is みずたま free?

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

### Is WaterCoach free?

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

### Do みずたま or WaterCoach have ads?

WaterCoach shows ads; みずたま does not.

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

みずたま ships an update every 4 days, and WaterCoach fortnightly. Most recently, みずたま was updated on October 31, 2026 and WaterCoach 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.*