There are now a number of maths apps that can be integrated into Mathematics lessons for effective learning. However, on the one hand it is difficult to maintain an overview and on the other hand there is sometimes a lack of ideas as to how the use of apps can be meaningfully integrated into lessons. The workshop is aimed at prospective mathematics teachers and introduces the MathAppFinder, which can be used to filter out mathematical apps depending on the grade level, main idea and mathematical topic. In addition, specific teaching ideas for selected apps that can be used in maths lessons will be presented.