lichess

This free and open-source chess app offers a comprehensive online and offline chess experience. Built by chess enthusiasts, it boasts a rapidly growing user base of 150,000 daily players.

Key Features:

• Multiple Game Modes: Play bullet, blitz, classical, and correspondence chess. Participate in arena tournaments.
• Social Features: Find, follow, and challenge other players. Track your game statistics.
• Practice & Learning: Hone your skills with chess puzzles.
• Game Variants: Explore numerous variants, playable online and offline, including Crazyhouse, Chess 960, King of the Hill, Three-check, Antichess, Atomic chess, Horde, and Racing Kings.
• Analysis Tools: Analyze games using local computer evaluation or server-based analysis with move annotations and game summaries.
• Opening & Endgame Exploration: Utilize unlimited opening explorer and endgame tablebase explorer tools.
• Offline Play: Play against the computer offline, or engage in Over The Board mode with a friend.
• Additional Features: A standalone chess clock, board editor, and availability in 80 languages are included. The app is designed for phones and tablets, supporting landscape mode.
• Completely Free & Open Source: Enjoy 100% free access, without ads, under the GPL v3 license.

Similar to lichess.org, this application is entirely free and ad-free, now and always.

Source Code:

• Mobile Application: https://github.com/veloce/lichobile
• Website & Server: https://lichess.org/source

Version 8.0.0 Updates (Last updated Dec 10, 2022)

This version includes ongoing improvements, new features, and bug fixes. For detailed release notes and information, visit: https://github.com/veloce/lichobile/releases