SonderChess

Free game review for your Chess.com games, on your phone. Stockfish on the device, no account, no server.

Free game review for your Chess.com games, on your phone. Stockfish runs on the device. No sign-up, no subscription, no server.

Features Share to review Chess.com's share button for live, daily and bot games, a pasted game link, or any PGN. Game review Accuracy for both players, an estimated game rating, the opening's name, the evaluation graph and a count of every move label. Every move labelled Brilliant, Great, Best, Excellent, Good, Book, Inaccuracy, Mistake, Miss or Blunder. The coach says what each move did, an arrow shows the better move and Best plays it. Next jumps to the next moment that matters. Your games Choose a Chess.com player (by username or a shared profile link) to see the ratings, followers, joined date and full game history from Chess.com's public data, with everyone's pictures. Or skip it: everything else works without. Stats Rating graphs, win, loss and draw records per time control over 7 days to all time, puzzle ratings, and the brilliant moves from your reviews. Play Bots from Pebble (400) to Titan (2500), plus SR, Mirror (plays at your rating) and Custom (any rating you set), or Stockfish at full strength. Hints, undo, draws by repetition, and a full review when the game ends. Or the custom board: move both sides, set up any position, and switch the engine on for its evaluation and best lines. Puzzles Over 46,000 puzzles that work offline, picked at your level, with your own puzzle rating and streak. Plus Chess.com's daily puzzle. Hints, the solution and retry on both. Review tab Paste a game link, a profile link or a PGN; the clipboard is only read when you tap Paste. Make it yours 20 boards, 7 piece sets, backgrounds or your own photo, 5 sound sets (with a sound of its own for brilliant moves), coordinates, highlights and animation speed. Works offline Reviews, your profile and your games stay on the phone and update when you're back online. Analysis never needs the internet.

What it does Finish a game on Chess.com, tap the share button and pick SonderChess. The app fetches the game, runs Stockfish on your phone and gives you a full review: accuracy, a label for every move, the evaluation graph and the better moves, in a layout that will feel familiar if you know Chess.com's.

Or just open it and choose a Chess.com player: it shows the profile, ratings and every game played, ready to review with a tap.

License GPL-3.0.