RondoChess

RondoChess is chess in your pocket: puzzles, games against the engine, a coach that explains your moves, and Stockfish analysis. Everything works offline, on a plane, outdoors, anywhere without signal. DAILY PUZZLE A new puzzle every day, the same for everyone. Solve it without peeking at the solution and add days to your daily streak. Rondo celebrates with you every time, and you can turn on a daily reminder (or turn it off whenever you like). PUZZLES AT YOUR LEVEL Over 100,000 tactical puzzles built into the app, sorted by difficulty. Your rating adjusts as you play, with hints when you need them. PLAY THE ENGINE Stockfish on your phone, from beginner to grandmaster. Pick a level and a color, undo moves and step through the game with big buttons. Optionally turn on the evaluation bar, hints and move quality. TRAIN WITH RONDO Rondo, your virtual coach, explains why a move is good or bad, flags your mistakes and shows the best options with arrows. You learn while you play. ANALYZE ANY POSITION A free board with Stockfish: paste a FEN or PGN, check the evaluation and best lines, and share your analysis. BUILT TO WORK WITHOUT INTERNET Puzzles, the engine and the coach work offline. Create your free account once and the app remembers you. Stockfish is free software (GPL-3.0). You can find the source code and licenses in the app, under Settings > About and licenses.