# 活動量計HR vs Water Requirement

The clearest difference is ads: 活動量計HR at none against Water Requirement's shown. 活動量計HR also leads on update cadence (monthly vs every 4 months) and iOS requirement (8.0 vs 16.2). 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.

活動量計HR ships an update monthly, Water Requirement every 4 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | 活動量計HR | Water Requirement |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | — |
| Size | 34 MB | 17 MB |
| Requires iOS | **8.0** | 16.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Kashimura Co., Ltd.](https://appshunter.io/developer/1487400380) | [Yuta Endo](https://appshunter.io/developer/1621719139) |

## What reviewers say

### 活動量計HR

[App page](https://appshunter.io/ios/app/hr/id1487400381)

This app supports daily exercise with heart rate monitoring. It helps maintain motivation by showing step counts and goals at a glance. Data is recorded on the device, allowing for easy transfer and synchronization with your smartphone at home.

**Highlights:** Heart rate monitoring, Step tracking, Goal setting, Data synchronization, HealthKit integration

**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 活動量計HR free?

活動量計HR 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 活動量計HR or Water Requirement have ads?

Water Requirement shows ads; 活動量計HR does not.

### Which is updated more often, 活動量計HR or Water Requirement?

活動量計HR ships an update monthly, and Water Requirement every 4 months. Most recently, 活動量計HR was updated on November 3, 2026 and Water Requirement on November 4, 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.*