# HydroRing vs おみず シンプル水分記録

The clearest difference is in-app purchases: おみず シンプル水分記録 at none against HydroRing's 1. おみず シンプル水分記録 also leads on update cadence (every 5 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HydroRing sells 1 one-off in-app purchase. おみず シンプル水分記録 asks for nothing beyond the download.

HydroRing ships an update every 6 weeks, おみず シンプル水分記録 every 5 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | HydroRing | おみず シンプル水分記録 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Size | 2 MB | 44 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [torankirite](https://appshunter.io/developer/1883564850) | [Ryotaro Shimada](https://appshunter.io/developer/1799537291) |

## What reviewers say

### HydroRing

[App page](https://appshunter.io/ios/app/hydroring-water-tracker/id6760393366)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HydroRing Premium | $3.99 | one-time |


### おみず シンプル水分記録

[App page](https://appshunter.io/ios/app/id6761106954)

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

**In-app purchases:** none


## Frequently asked questions

### Is HydroRing free?

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

### Is おみず シンプル水分記録 free?

おみず シンプル水分記録 is free to download, with no in-app purchases.

### Do HydroRing or おみず シンプル水分記録 have ads?

Neither HydroRing nor おみず シンプル水分記録 shows ads.

### Which is updated more often, HydroRing or おみず シンプル水分記録?

HydroRing ships an update every 6 weeks, and おみず シンプル水分記録 every 5 days. Most recently, HydroRing was updated on October 31, 2026 and おみず シンプル水分記録 on November 6, 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.*