# 攻略アプリ〜逆転の書〜 for 逆転オセロニア vs Holotaimu

The clearest difference is review sentiment: Holotaimu at 93% against 攻略アプリ〜逆転の書〜 for 逆転オセロニア's 58%. Holotaimu also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

攻略アプリ〜逆転の書〜 for 逆転オセロニア ships an update every 3 months, Holotaimu every 3 weeks. The most recent releases landed on June 10, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | 攻略アプリ〜逆転の書〜 for 逆転オセロニア | Holotaimu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (26 ratings)](https://appshunter.io/ios/app/holotaimu/id1581270864/reviews)** |
| Number of ratings | — | **26** |
| Positive reviews | 58.0% of reviews | **93.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 25 MB | 165 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [SKILL-POOL Inc.](https://appshunter.io/developer/1781587540) | [Masahiro Ikeda](https://appshunter.io/developer/1551911934) |

## What reviewers say

### 攻略アプリ〜逆転の書〜 for 逆転オセロニア

[App page](https://appshunter.io/ios/app/for/id1149258978)

This app provides comprehensive data and tools for the popular game "Gyakuten Othello Nia". Features include character stats, a deck simulator, strategy guides, and a damage calculator to enhance gameplay.

**Highlights:** Character stats and skill information, Deck simulator for strategy planning, Othello strategy guides and practice board, Damage calculation tool, Past successful deck analysis, Icon maker for social media

**Features:** macOS Compatibility

**In-app purchases:** none


### Holotaimu

[App page](https://appshunter.io/ios/app/holotaimu/id1581270864)

This app provides real-time live stream information for Hololive content creators. It allows users to select favorite channels, receive customizable notifications for stream starts, updates, and ends, and view past stream history. The schedule is displayed in local time for convenience.

**Highlights:** Live stream schedule updates, Customizable start/end notifications, Home screen widgets, Customizable notification sounds, 1-4 week stream history, Local time display for schedules

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

**In-app purchases:** none


## Frequently asked questions

### Is 攻略アプリ〜逆転の書〜 for 逆転オセロニア free?

攻略アプリ〜逆転の書〜 for 逆転オセロニア is free to download, with no in-app purchases.

### Is Holotaimu free?

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

### Do 攻略アプリ〜逆転の書〜 for 逆転オセロニア or Holotaimu have ads?

Neither 攻略アプリ〜逆転の書〜 for 逆転オセロニア nor Holotaimu shows ads.

### Which is updated more often, 攻略アプリ〜逆転の書〜 for 逆転オセロニア or Holotaimu?

攻略アプリ〜逆転の書〜 for 逆転オセロニア ships an update every 3 months, and Holotaimu every 3 weeks. Most recently, 攻略アプリ〜逆転の書〜 for 逆転オセロニア was updated on June 10, 2026 and Holotaimu on September 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.*