Chess Clock by Chess.com vs 4D Chess

Replace your chess clock with this free game timer! It's easy to use, yet fully featured to handle any time control. 100% free: no in-app purchases, no ads! Choose your time control and you're ready to play. The 2nd player presses her button to start the 1st player's clock - and the game is on! FEATURES - Large, easy-to-read buttons - Works in landscape and portrait on all devices - Quickly customize the app for one-tap access to all your favorite time controls - Time controls include base minutes per player and optional per-move delays or bonus time. The app supports both Fischer and Bronstein increments, as well as simple delays. The duration is up to you! - Supports multiple-stage time controls commonly seen in tournaments, such as "40 moves in 2 hours + game in 60 minutes." A glance at the clock shows your current stage! - Support for handicapping lets you set different time controls for each player! - You can adjust the time remaining on the fly, in the middle of your game, for either or both players! - Clock pauses automatically if the app is interrupted; manually pause the clock at any time - Pleasant sounds for buttons and "time's up" alert At Chess.com, we really do love chess, and *sometimes* we even play it offline! For times like that, we created this clock - and we hope you love it as much as we do.

Chess beyond one board. Four connected boards. One shared game. Discover a spatial chess variant where familiar pieces move through four dimensions, and a new perspective can reveal your next idea. LEARN BY MAKING A MOVE Start with a simple rook move. Watch a demonstration, try it yourself, and build your understanding one step at a time. Guided lessons introduce coordinates, connected spaces, and moves beyond a single board. SEE YOUR MOVE IN CONTEXT Turn on Move Helper to preview a move before you commit. Explore a possible opponent reply and follow the attacker and its target in 2D, 3D, or a 4D projection. A preview is one possibility, not a guarantee of the best move. ONE POSITION. THREE PERSPECTIVES. Read the flat boards, explore the 3D view, or rotate the 4D projection. Zoom in on one board, keep nearby spaces in view, or compare two planes. On iPad, use the flat and spatial views side by side, with move history and context close at hand. START SMALL. EXPLORE MORE. Begin with eight pieces per side. Try the compact ten-piece opening, or a full sixteen-piece army with more room to develop on 96 squares. Explore the experimental four-space 8×8 board with 256 squares. Short challenges give you a clear goal: save a piece, find a fork, or earn a promotion. PLAY OFFLINE Play against an on-device computer opponent with three difficulty levels, or take turns with a friend on the same device. Choose an untimed game or add a clock. No account is needed. MAKE YOURSELF AT HOME Create an optional private profile with Apple, Google, or guest sign-in. Choose a display name and chess avatar; profile sync uses your app account and private iCloud storage. All gameplay and learning remain available without signing in. Return to saved games, review your moves, and follow your learning progress. Choose Light, Dark, or System appearance. Designed for iPhone and iPad. Available in English, Ukrainian, Spanish, French, German, Brazilian Portuguese, Japanese, and Simplified Chinese. 4D Chess: New Dimension is a custom spatial chess variant. The compact board has 64 squares; the full-army board has 96; the experimental expanded board has 256. Each uses four connected planes, one position, and one turn at a time.