Blunder vs Chessmirror

Take a photo, open it in Blunder, and start exploring a chess position. Super fast! Blunder turns photos and screenshots of chessboards into interactive positions, with quick access to the camera and your photo library. FROM PHOTO TO POSITION - Recognize boards in screenshots and photos, including photos taken at an angle. - Automatically detect the board orientation. - Infer whose turn it is from highlighted last-move squares when available, or change the side to move yourself. EXPLORE THE BEST MOVES - View Stockfish analysis powered by Lichess. - Choose how many alternative lines to show. - Tap moves in a line to explore the continuation. - Choose an analysis time and available engine options. - Switch between the Blunder analysis view and the Lichess view. BUILD YOUR CHESS LIBRARY - Revisit recent games in a visual board gallery. - Save favorites and organize positions into folders. - Sync your library with iCloud across iPhone and iPad. - Turn off automatic history while keeping your favorites and organized games. SHARE AND CONTINUE Share positions as FEN, or open them in Lichess or Chess.com. Blunder requires iOS 26 or later. Internet access is required for Lichess analysis. Recognition results can vary with image quality and board design. BLUNDER PRO Your first 20 scans are free. Blunder Pro unlocks unlimited scans with a monthly or yearly subscription, or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel them in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lucas.io/privacy

Chessmirror turns the moves you got wrong into the positions you practise, so the same mistake does not stand in your next game. PHOTOGRAPH A BOARD Point the camera at a real board, a book diagram or a screenshot. Chessmirror reads the position on the device, lets you correct any piece, the side to move and castling rights, and opens it as a game. PLAY WITH NO SLIPS Play against Stockfish 18, built into the app, at a strength you choose. With No Slips on, a move that gives away too much is handed back to you before it is played — and written down, so you meet that position again. A MISTAKE BOOK THAT WRITES ITSELF Every costly move becomes an entry: one position, however many games it turned up in, with what you played and what it cost in winning chances. Import your games from lichess or Chess.com by username, or paste a PGN or FEN, and have every move scored locally. A DAILY THAT KNOWS WHAT IS DUE Practice is scheduled by spaced repetition (FSRS). Each day's queue holds the positions that are due and a few new ones. Play the move, get a plain verdict — passed or not — and play on if you want to. FOUND FOR YOU Mates and tactics the engine found in your own games are collected into sets. Tap the heart on any position to keep it in your favourites. PRIVATE BY DESIGN • Recognition and analysis run on your device. No account, no ads, no tracking. • Games are plain PGN files in your own iCloud Drive, visible in the Files app. • The network is used only when you ask to import games from a chess site. Also: a face-to-face mode for over-the-board play on one phone, an advantage bar, dark mode, iPad layouts, and eight languages — English, Simplified Chinese, Japanese, Korean, French, German, Spanish and Portuguese. Chessmirror is free software under the GPLv3. Source code: https://github.com/sunfmin/chessmirror