In a recent post on Rockstar Games Twitter account, they've announced that they have released an update to iFruit, the companion app for Grand Theft Auto V that runs on iOS devices. The new version is 2.0 and it address connectivity issues people were experiencing.
Some users were reporting problems linking account and properly syncing game statistics as well as issues with content not loading in the correct manner in the Social Club. Rockstar had stated previously that they were aware of issues, and seem to have found the problem.
Rockstar is currently working on developing the application for Android, Windows Phone, PlayStation Mobile and the PlayStation Vita.