# UNK vs Water Requirement

The clearest difference is ads: UNK at none against Water Requirement's shown. UNK also leads on iOS requirement (12.0 vs 16.2). Water Requirement's advantage is update cadence (every 4 months vs every 9 months). On price, in-app purchases and device support 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, Water Requirement every 4 months. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | UNK | Water Requirement |
| --- | --- | --- |
| 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 | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 13 MB | 17 MB |
| Requires iOS | **12.0** | 16.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [QOX](https://appshunter.io/developer/427460006) | [Yuta Endo](https://appshunter.io/developer/1621719139) |

## 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


### Water Requirement

[App page](https://appshunter.io/ios/app/water-requirement/id6502707566)

**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 Water Requirement free?

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

### Do UNK or Water Requirement have ads?

Water Requirement shows ads; UNK does not.

### Which is updated more often, UNK or Water Requirement?

UNK ships an update every 9 months, and Water Requirement every 4 months. Most recently, UNK was updated on October 7, 2026 and Water Requirement on October 18, 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.*