Of course you don't need an app to play foosball, just a foosball table, a ball and at least one opponent. However, if you play foosball in a group of 4 or more people and need a pen and paper to keep track of the results and want to play a preliminary round or a knock-out round, then the app can help you:

With the KOMM KICKERN app you can replace pen and paper and save your results for all times. You have your own account, collect your personal statistics and you can easily run tournaments or just join in.

Simply open the app - find a location or start a tournament - play the tournament - repeat.