# Shogi Lab: Sunfish Engine — Engine Analysis & Match

> Shogi game with advanced engine analysis, online/offline play, and match replay. (iPhone/iPad app by koji ozono.)

- Source: https://appshunter.io/ios/app/shogi-lab-sunfish-engine/id6757245157 (this page in markdown: same URL + `.md`)
- Developer: [koji ozono](https://appshunter.io/developer/1826482515)
- Category: Games, Board, Strategy
- Price: Free with in-app purchases (on sale, was $2.59)
- Age rating: 4+
- Requires: iOS 17.6 · 78 MB
- Languages: American English, Japanese
- Released: 2026-01-01
- Data updated: 2026-08-31
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/shogi-lab-sunfish-engine/id6757245157/reviews.md

## What is Shogi Lab?

This is a shogi app powered by the full-featured Sunfish4 engine. With clear piece design and calm, intuitive controls, you can enjoy smooth gameplay from the opening to the endgame. It includes real-time evaluation during matches as well as game record replay and analysis features, allowing you to complete the entire flow from playing to reviewing within the app. Online matches with rankings are supported, and offline CPU matches are also available.

Main Features

▪ In-Game Analysis (During Match)
・View evaluation values and graphs in real time.

▪ Thinking Time Visualization (During Match)
・Display thinking time on the move list.
・Long thinks are highlighted in red (top 5%) and yellow (top 15%).

▪ Key Move Detection (During Match / Analysis)
・Automatically highlights moves where the evaluation changes significantly.

▪ Game Record Analysis (Analysis)
・Replay, fast-forward, and rewind past games for review.
・Import KIF and CSA files for replay and analysis.

▪ Position Jump (Analysis)
・Instantly move to any position within the game record.

▪ Save & Resume (During Match)
・Pause a match and resume later.

▪ Adjustable CPU Strength (During Match)
・Set the difficulty level from practice to serious play.

▪ First/Second Move Selection (Start)
・Choose to play as Black or White.

▪ Take Back Move (During Match)
・Undo the last move.

▪ Legal Move Display (During Match)
・Show available moves to help prevent mistakes.

▪ Haptics & Animations (Controls)
・Smooth and responsive interaction.

▪ Online Multiplayer
・Supports ranked online matches.
・Offline CPU matches and local two-player mode are also available.

## Key features

- In-game analysis with real-time evaluation
- Thinking time visualization
- Key move detection
- Game record replay and analysis
- Online ranked matches
- Adjustable CPU strength
- Save and resume matches

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Shogi Lab Pro | $3.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/shogi-lab-sunfish-engine/id6757245157/reviews.md

### 1/5 — 無駄金

*2026-05-06*

分析、研究はこのアプリ内の対局のものしかできません。まじでお金無駄にした。皆さんは別のサイト使いましょう

**Developer response:** ご意見ありがとうございます。
本アプリはアプリ内対局を中心とした仕様となっており、
KIF取り込み等は当時アプリの機能として一切記載しておりませんでした。
ただおっしゃるとおり、対局データの取り込みは有用と思いましたので、
現バージョンではKIF / CSA形式の棋譜を取り込んで再生・分析できる機能追加をしております。
どうぞよろしくお願いいたします。

### 5/5 — かなり安い

*2026-01-22*

駒が綺麗で良いですね😃グラフも面白い。

## Frequently asked questions about Shogi Lab

### Does Shogi Lab have ads?

Yes, Shogi Lab contains advertisements. These ads are displayed within the application to support its development and free availability.

### What devices is Shogi Lab available on?

Shogi Lab is available on iPhone and iPad devices. It is designed to provide a smooth experience across these Apple platforms.

### Can I play Shogi Lab offline?

Yes, Shogi Lab supports offline CPU matches. You can enjoy playing against the computer at various difficulty levels without an internet connection.

### How does Shogi Lab help me improve my game?

Shogi Lab offers in-game analysis with real-time evaluation, thinking time visualization, and key move detection. You can also replay and analyze past games to identify areas for improvement.

### What are the online multiplayer options in Shogi Lab?

Shogi Lab supports online ranked matches, allowing you to compete against other players globally. You can track your progress through rankings.

### Can I import game records into Shogi Lab?

Yes, Shogi Lab allows you to import game records in KIF and CSA file formats. This enables you to replay and analyze games played elsewhere.

### What is the age rating for Shogi Lab?

Shogi Lab has an age rating of 4+. This indicates it is suitable for a wide range of players, including younger audiences interested in strategy games.

### How often is Shogi Lab updated?

The latest version of Shogi Lab is 2.0.4, last updated on May 9, 2026. Updates typically include bug fixes and feature enhancements to improve gameplay and analysis.

## Version history (last 5 releases)

### 2.0.4 — 2026-05-09

- Added support for importing KIF / CSA game record files
- Added replay and analysis support for imported game records
- Adjusted parts of the UI
- Fixed minor issues

### 2.0.3 — 2026-03-24

• Made adjustments to the internal workings of ad display.

### 2.0.2 — 2026-03-21

• Fixed an issue where customers who previously purchased this app were unable to use Pro features.

### 2.0.1 — 2026-03-17

• Refined the settings screen layout for better usability.
• Optimized internal ad delivery systems for improved app stability.
• Minor bug fixes and performance improvements.

### 2.0.0 — 2026-03-17

• App Consolidation: The free and paid versions have been merged into a single app.
• Introduction of Pro Version (In-App Purchase): An upgrade option has been added to remove ads and unlock features such as unlimited game saving, advanced analysis, and premium textures.
• Support for Existing Users: Users who used the app prior to version 2.0.0 will automatically have Pro features enabled.

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## More apps by koji ozono

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- [Gomoku: Zen Five in a Row](https://appshunter.io/ios/app/gomoku-zen-five-in-a-row/id6756268340)
- [Reversi Simple:Satisfying Flip](https://appshunter.io/ios/app/reversi-simplesatisfying-flip/id6757232677)
- [Go Lab: AI Baduk KataGo Engine](https://appshunter.io/ios/app/go-lab-ai-baduk-katago-engine/id6757245003)
- [Chess Lab: Arasan AI Engine](https://appshunter.io/ios/app/chess-lab-arasan-ai-engine/id6757245101)

All apps by koji ozono: https://appshunter.io/developer/1826482515

## Related topics

[shokz open move](https://appshunter.io/ios/topics/shokz-open-move)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*