# Stockfish Chess

> Board

Canonical page: [https://chrome-stats.com/d/id305558605](https://chrome-stats.com/d/id305558605)

## Overview

- **ID:** `id305558605`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Tord Romstad
- **Category:** Board
- **Rating:** 4.00 / 5 (217 ratings)
- **Version:** 2.13.0
- **Last updated:** 2014-10-29
- **First published:** 2009-02-22
- **Size:** 38 MB
- **Data as of:** 2026-09-23
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/stockfish-chess/id305558605)
- **Website:** [http://www.stockfishchess.org](http://www.stockfishchess.org/)

## Description

Stockfish Chess is a free, powerful Chrome chess extension that brings a top-tier engine to your browser. It plays aggressively and dynamically, willing to sacrifice material for initiative, and offers adjustable strength plus a range of styles from Passive to Suicidal.

It includes a deep opening book, PGN save/load, easy board setup, multiple piece sets and color schemes, and full engine analysis with evaluations and main lines. You can play against the machine or on both sides, with or without book moves and analysis, and you can transfer PGN files between devices—plus all source code is open under the GNU GPL.

## Rankings

- #107,186 — Overall

## Review summary

Stockfish Chess on iOS offers a powerful, ad-free engine with strong offline analysis and a user-friendly play-and-analyze workflow. However, users frequently report stability issues (crashes with PGN loading/saving), analysis bugs (inconsistent analysis, missing hints), and settings that don’t persist, plus a lack of ongoing updates. It’s a top-tier tool for serious practice, but reliability improvements and active development are needed.

### Pros

- Very strong Stockfish engine capable of challenging grandmasters and providing deep analysis.
- No ads, offering a clean, distraction-free experience.
- Excellent offline analysis with the ability to replay games and study mistakes.
- User-friendly interface that makes it easy to play and analyze.

### Cons

- Stability issues with PGN loading/exporting and saving games, causing frequent crashes.
- Analysis mode bugs and missing features (inconsistent continuous analysis, hints unavailable, no think-time on opponent's turn).
- AI strength/difficulty resets to 20 and settings don’t persist across sessions.
- Lack of active updates; app feels outdated and may not be fully compatible with newer iOS versions.

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Source: [Chrome-Stats](https://chrome-stats.com/d/id305558605)