The iFruit app was the official supplement for GTA 5 and GTA Online. There you could find out the news, chat in the Rockstar Social Club, tune cars and take care of Chop the Rottweiler. Today it's impossible to download the app legally, as it was removed from the App Store and Google Play. The app had mixed reviews. Rockstar Games stopped supporting iFruit a long time ago. The application had problems with working on new smartphones and there is no content from the latest DLC for GTA Online.