Logicals is a game that allows you to solve logic grid puzzles similar to Einstein's famous zebra puzzle - "Who has the fish?" - on your iPhone. The game has six riddles categorized into easy, medium, and hard levels with four or five values per category. Additionally, there are 36 more riddles available in the Logicals Pro version, which includes easy, medium, and hard levels with five values per category. More level packs are available via in-app purchases.

The game has three different layouts: light, coffee, and dark, with full/empty, plus/minus, and check/cross variants. The game is available in two languages, English and German. The game's interface allows you to solve the puzzles easily by tapping once for "does not match" and twice for "matches". The game also has a timer and Game Center support. You can check the current state at any time, and there is a solving table to help you get a better overview (iPad only).