Practitioners on the area of mobile application development usually rely on set of app-related success factors, the majority of which are directly related to their economical/business profit (e.g., number of downloads, or the in-app purchases revenue). However, gathering also the user-related success factors, that explain the reasons why users choose, download, and install apps as well as the user-related failure factors that explain the reasons why users delete apps, might help practitioners understand how to improve the market impact of their apps. The objectives were to: identify (i) the reasons why users choose and installing mobile apps from app stores; (ii) the reasons why users uninstall the apps. A questionnaire-based survey involving 121 users from 26 different countries was conducted. © Springer International Publishing AG 2017.