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SmallFish — iOS chess app running Stockfish
SmallFish is a free chess application for iPhone that runs the Stockfish engine. It uses Stockfish 15.1 with NNUE and is roughly rated in the 3300+ Elo range, making it one of the most powerful mobile chess tools available.
Engine details and strength
Built on the latest Stockfish 15.1 NNUE release, SmallFish delivers high-level analysis and a very strong opponent for training and practice. Its engine strength places it among the top-tier chess apps for study and play.
Ways the app can help you get better
- Play targeted practice games against the engine at different strengths and settings.
- Review and analyze your completed games with multi-line analysis and visual feedback.
- Study specific positions with tools like opening books and endgame tablebases.
Key tools and capabilities
- Opening books for structured study and preparation
- Endgame tablebase access for precise conversion and technique practice
- Support for a dark interface for playing in low-light conditions
- Game previews and replay features for quick review
- Visual, graphical evaluation of positions to spot trends and imbalances
- Multi-line analysis for exploring alternative continuations and candidate moves
- Automated blunder detection to highlight tactical mistakes
Usability and pricing
The app is designed with a simple, user-friendly interface suitable for beginners and advanced players alike. SmallFish is free to download on the App Store and does not include in-app purchases.
Recommended alternative
If you want another option, try Analyze This — a free analysis app that many players use alongside SmallFish for additional study features.
Download SmallFish on your iPhone to begin analyzing your games and sharpening your play.
Technical
- iPhone
- Full
