# -活動量計- vs SleepSign

The clearest difference is iOS requirement: -活動量計- at 9.0 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. Both last shipped on November 3, 2026.

## The numbers

| Metric | -活動量計- | SleepSign |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | — |
| Size | 67 MB | 32 MB |
| Requires iOS | **9.0** | 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-

[App page](https://appshunter.io/ios/app/id1487409825)

This app tracks daily activity with heart rate monitoring to help you stay motivated. It records data on the device for easy syncing with your smartphone at home. Data can be synced with Apple Health for a consolidated view of your fitness.

**Highlights:** Heart rate monitoring, Step tracking, Goal setting, On-device data recording, Smartphone syncing, Apple Health integration

**Features:** macOS Compatibility

**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- free?

-活動量計- 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- or SleepSign have ads?

Neither -活動量計- nor SleepSign shows ads.

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

-活動量計- ships an update monthly, and SleepSign monthly. Most recently, -活動量計- was updated on November 3, 2026 and SleepSign on November 3, 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.*