Montana Solitaire is a free Android card game developed by AlgoTech. It is part of the Montana family of card games, where players arrange cards from Deuce to King in four rows using one standard 52-card deck. The player is dealt all 52 cards at the beginning in four rows of 13 cards, with Aces removed to create gaps. The goal is to move the cards in the gaps so that it is one rank higher from the card to its left. The aim is to move all cards around to create four in-suit sequences from Deuce to King in each row.

The game contains three variations of Montana Solitaire: Montana Solitaire, Gaps Solitaire, and Addiction Solitaire. Each variation offers a unique challenge and will keep you entertained for hours. With features like save game state to play later, unlimited undo, and game play statistics, Montana Solitaire is a must-try for any card game enthusiast looking for a fun and challenging game to play on their Android device.