ESP is a launcher application. When you install it you have to grant several permissions regarding access to your phone data (contacts, etc.). This information is necessary for the application to offer its functionalities (simplified phone calls, messages, notifications). None of this data will be transmitted over the network (except location transmitted with SOS messages to the contacts you define if this service is enabled) nor stored outside of your phone.
However, this app uses Google Analytics to collect the usage statistics. Google Analytics is an analysis service provided by Google Inc. (“Google”). Google utilizes the Data collected to track and examine the use of this Application, to prepare reports on its activities and share them with other Google services. Google may use the Data collected to contextualize and personalize the ads of its own advertising network.