Go to Google Play and install DroidFish (by Peter Österlund). It is free, open-source, and the gold standard for engine analysis.
Copy the houdini_6_arm file to a folder on your internal storage, e.g., /storage/emulated/0/chess_engines/ . houdini chess engine for android full
While it is no longer the absolute strongest engine—Stockfish and Dragon have surpassed it—Houdini offers a nostalgic, aggressive, and deeply tactical alternative to the "drawish perfection" of modern neural networks. It is the muscle car of chess engines: not the most efficient, not the newest, but when you hear it roar (or see the NPS counter spin up), you know you are wielding raw power. Go to Google Play and install DroidFish (by