Desktop App
Native chess analysis for macOS and Windows. Stockfish 18 runs locally — fast, offline, no browser needed.
Desktop app included with Premium. macOS (Apple Silicon + Intel) and Windows 64-bit.
Native Stockfish 18
The engine runs directly on your machine for deeper, faster analysis than any browser version.
Works offline
No internet needed for analysis. Full engine power even without connection.
Play vs AI
Adjustable ELO slider from 400 to 3650. Every level calibrated with UCI_Elo.
AI Coach
Move-by-move commentary that explains why each move matters. 19 languages.
Human Mode (No Ban)
Undetectable moves that look natural. Opponents can't tell you're using an engine.
Fast install
Under 200 MB. Installs in seconds. No telemetry, no background processes.
System requirements
- macOS 11 (Big Sur) or later
- Apple Silicon (M1/M2/M3/M4) or Intel
- ~200 MB disk space
- Windows 10 or 11 (64-bit)
- ~200 MB disk space
First-time install
macOS: Drag the app to Applications. On first launch, macOS shows "unidentified developer".
- Double-click the app — you'll see a warning, click Done.
- Open System Settings → Privacy & Security.
- Scroll down and click Open Anyway next to ChessCalculator.
- Confirm with your Mac password. The app opens and stays trusted from then on.
Older macOS still showing "damaged"? Click here.
Open Terminal (Cmd+Space → "Terminal") and paste:
xattr -dr com.apple.quarantine /Applications/ChessCalculator.app
Press Enter, then double-click the app.
Windows: Run the installer. If SmartScreen warns, click "More info" → "Run anyway".