# REWAVE　公式アプリ vs Relation　Nail

REWAVE　公式アプリ and Relation　Nail are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

REWAVE　公式アプリ ships an update every 40 months, Relation　Nail every 39 months. The most recent releases landed on September 16, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | REWAVE　公式アプリ | Relation　Nail |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 39 months** |
| Size | 15 MB | 15 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KIYOTOSHI YOSHIDA](https://appshunter.io/developer/1440735695) | [KIYOMI MATSUFUSA](https://appshunter.io/developer/1445924948) |

## What reviewers say

### REWAVE　公式アプリ

[App page](https://appshunter.io/ios/app/rewave/id1440735696)

**In-app purchases:** none


### Relation　Nail

[App page](https://appshunter.io/ios/app/relation-nail/id1445924949)

**In-app purchases:** none


## Frequently asked questions

### Is REWAVE　公式アプリ free?

REWAVE　公式アプリ is free to download, with no in-app purchases.

### Is Relation　Nail free?

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

### Do REWAVE　公式アプリ or Relation　Nail have ads?

Neither REWAVE　公式アプリ nor Relation　Nail shows ads.

### Which is updated more often, REWAVE　公式アプリ or Relation　Nail?

REWAVE　公式アプリ ships an update every 40 months, and Relation　Nail every 39 months. Most recently, REWAVE　公式アプリ was updated on September 16, 2026 and Relation　Nail on September 13, 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.*