Focus on the pronunciation of app
English definition of “app”
/æp/ noun [C]
› IT abbreviation for application or application program: a computer program that is designed for a particular purpose: After plugging the unit into your wired network, you run a little app on your PC that searches the network to locate the camera. → See also killer app
› IT, COMMUNICATIONS abbreviation for application or application program: a small computer program that you can download onto a mobile phone: There are apps for everything, from learning Swedish to booking cinema tickets.