# UNK vs みずたま

The clearest difference is review sentiment: みずたま at 100% against UNK's 33%. みずたま also leads on update cadence (every 3 days vs every 9 months). UNK's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

UNK ships an update every 9 months, みずたま every 3 days. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | UNK | みずたま |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unk/id1045846821/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 days** |
| Monetization | Free | Free |
| Size | 13 MB | 63 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [QOX](https://appshunter.io/developer/427460006) | [Hayato Tsuchikawa](https://appshunter.io/developer/1863967283) |

## What reviewers say

### UNK

[App page](https://appshunter.io/ios/app/unk/id1045846821)

Track your daily bowel movements to monitor your physical condition and identify potential health issues like constipation. This app helps you become more aware of your body's signals and take control of your digestive health.

**Highlights:** Record daily bowel movements, Monitor physical conditions, Identify constipation, Improve digestive health, Track bathroom frequency

**Features:** macOS Compatibility

**In-app purchases:** none


### 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

**In-app purchases:** none


## Frequently asked questions

### Is UNK free?

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

### Is みずたま free?

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

### Do UNK or みずたま have ads?

Neither UNK nor みずたま shows ads.

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

UNK ships an update every 9 months, and みずたま every 3 days. Most recently, UNK was updated on October 7, 2026 and みずたま on October 1, 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.*