Microsoft Solitaire Collection is a free series of solitaire games from Microsoft that are all bundled into a single app. You'll find all the most popular solitaire game variants, including Klondike, FreeCell, Spider, TriPeaks, and Pyramid. There are dedicated rules for each variant, and the game can walk you through each rule set before you start playing.

While these games are the descendants of the original versions that were bundled with Windows 95 many years ago, they have been optimized to work on a mobile platform like the Android. The app also features daily challenges for added bonuses. Each challenge is designed to test your skills at various forms of solitaire, and you can use the rewards from those challenges to access new card varieties and designs. This not only gives the game a sense of accomplishment, but it adds a sense of a goal to the raw logic of simple solitaire.

There are certainly other examples of solitaire apps for the Android, but this is one of the best you'll ever encounter. The user interface is sleek and sophisticated, and there are plenty of customizable options to help make the experience as fun and engaging as possible for the player.