A mobile phone is an integral part of everyday life. We do our best with it, using a variety of apps for business, home, and entertainment. Sergejs Nikitjuks and Rasma Magiča, students of the Customs and Tax Administration Program of Riga Technical University, conducted research on the services provided to taxpayers in the mobile app. That's what associate professor Māras Juruš and associate professor Justina Hudenko are discussing.