# 本を探す vs Rusty to Shine 公式アプリ

The clearest difference is ads: Rusty to Shine 公式アプリ at none against 本を探す's shown. Rusty to Shine 公式アプリ also leads on iOS requirement (13.0 vs 16.0). 本を探す's advantage is update cadence (monthly vs every 4 months). 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.

本を探す ships an update monthly, Rusty to Shine 公式アプリ every 4 months. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 本を探す | Rusty to Shine 公式アプリ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 4 months |
| Size | 4 MB | 74 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KAZUYUKI TAJIMA](https://appshunter.io/developer/876885221) | [TAKEHITO SHIDARA](https://appshunter.io/developer/1545877789) |

## What reviewers say

### 本を探す

[App page](https://appshunter.io/ios/app/id956844697)

**In-app purchases:** none


### Rusty to Shine 公式アプリ

[App page](https://appshunter.io/ios/app/rusty-to-shine/id1547720537)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 本を探す free?

本を探す is free to download, with no in-app purchases.

### Is Rusty to Shine 公式アプリ free?

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

### Do 本を探す or Rusty to Shine 公式アプリ have ads?

本を探す shows ads; Rusty to Shine 公式アプリ does not.

### Which is updated more often, 本を探す or Rusty to Shine 公式アプリ?

本を探す ships an update monthly, and Rusty to Shine 公式アプリ every 4 months. Most recently, 本を探す was updated on October 10, 2026 and Rusty to Shine 公式アプリ on October 14, 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.*