Rockstar has released the iFruit app ahead of tomorrow's Grand Theft Auto V street date.

The app appeared on iTunes this morning and it will be used throughout the game to customize your car and train your pet Rottweiler, Chop, to be a better murder puppy. The app weighs in at 444MB and will integrate your Rockstar Social Club profile as well as the in-game Facebook parody, Lifeinvader. Chop is Franklin's companion throughout the game and using the app to train him will increase Chop's happiness and effectiveness as a partner.

Check out the screens below.

GTA 5 hits PS3 and Xbox 360 on September 17.

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