# 逆歩数計 vs むくみ予報

The clearest difference is in-app purchases: 逆歩数計 at none against むくみ予報's 1. 逆歩数計 also leads on update cadence (every 4 days vs every 5 weeks) and iOS requirement (15.0 vs 18.0). むくみ予報's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. むくみ予報 sells 1 one-off in-app purchase. 逆歩数計 asks for nothing beyond the download.

逆歩数計 ships an update every 4 days, むくみ予報 every 5 weeks. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 逆歩数計 | むくみ予報 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 5 weeks |
| Size | 8 MB | 6 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [RAITO SASAGAWA](https://appshunter.io/developer/6780805981) | [kazunari aoki](https://appshunter.io/developer/6774180811) |

## What reviewers say

### 逆歩数計

[App page](https://appshunter.io/ios/app/id6794137697)

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

**In-app purchases:** none


### むくみ予報

[App page](https://appshunter.io/ios/app/id6796861479)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Puffiness Forecast Pro | $9.99 | one-time |


## Frequently asked questions

### Is 逆歩数計 free?

逆歩数計 is free to download, with no in-app purchases.

### Is むくみ予報 free?

むくみ予報 is free to download, with in-app purchases available.

### Do 逆歩数計 or むくみ予報 have ads?

逆歩数計 shows ads; むくみ予報 does not.

### Which is updated more often, 逆歩数計 or むくみ予報?

逆歩数計 ships an update every 4 days, and むくみ予報 every 5 weeks. Most recently, 逆歩数計 was updated on October 9, 2026 and むくみ予報 on October 11, 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.*