# 活動量計HR vs SleepSign

The clearest difference is iOS requirement: 活動量計HR at 8.0 against SleepSign's 15.5. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 28, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | 活動量計HR | SleepSign |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | — |
| Size | 34 MB | 32 MB |
| Requires iOS | **8.0** | 15.5 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Kashimura Co., Ltd.](https://appshunter.io/developer/1487400380) | [Kissei Comtec Co., Ltd.](https://appshunter.io/developer/503794772) |

## 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


### SleepSign

[App page](https://appshunter.io/ios/app/sleepsign-cloud/id1661601576)

**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 SleepSign free?

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

### Do 活動量計HR or SleepSign have ads?

Neither 活動量計HR nor SleepSign shows ads.

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

活動量計HR ships an update monthly, and SleepSign monthly. Most recently, 活動量計HR was updated on September 28, 2026 and SleepSign on September 17, 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.*