The game uses a port of Shredder chess engine.
[2] In 2006, Pocket Fritz 1 and 2 lost the online ability to search positions on Chessbase servers.
[4] The successor Pocket Fritz 4 was released in 2009 and uses Hiarcs 13 as engine.
[5] The Pocket Fritz 4 won the Copa Mercosur tournament, a category 6 tournament in Buenos Aires, Argentina, with nine wins and one draw on August 4–14, 2009.
The Pocket Fritz 4 was running on the mobile phone HTC Touch HD.