# Kidney Note vs Mr. Kidney | Water Tracker

The clearest difference is in-app purchases: Mr. Kidney | Water Tracker at none against Kidney Note's 1. Mr. Kidney | Water Tracker also leads on iOS requirement (15.1 vs 26.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Kidney Note sells 1 in-app purchase, starting at $0.99 per month. Mr. Kidney | Water Tracker asks for nothing beyond the download.

Kidney Note ships an update every 9 days, Mr. Kidney | Water Tracker every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Kidney Note | Mr. Kidney | Water Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 18 MB | 177 MB |
| Requires iOS | 26.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [shinichi tanimoto](https://appshunter.io/developer/338978015) | [Mehmet Akif KUMRU](https://appshunter.io/developer/1827266404) |

## What reviewers say

### Kidney Note

[App page](https://appshunter.io/ios/app/kidney-note/id6745475185)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multiple User Registration | $0.99 | per month |


### Mr. Kidney | Water Tracker

[App page](https://appshunter.io/ios/app/mr-kidney-water-tracker/id6766507234)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kidney Note free?

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

### Is Mr. Kidney | Water Tracker free?

Mr. Kidney | Water Tracker is free to download, with no in-app purchases.

### Do Kidney Note or Mr. Kidney | Water Tracker have ads?

Both Kidney Note and Mr. Kidney | Water Tracker show ads.

### Which is updated more often, Kidney Note or Mr. Kidney | Water Tracker?

Kidney Note ships an update every 9 days, and Mr. Kidney | Water Tracker every 2 weeks. Most recently, Kidney Note was updated on October 25, 2026 and Mr. Kidney | Water Tracker on October 25, 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.*