Best good app with different type of levels that makes us happy and release tension and spends time also its graphics is good with good sounds background music are good with triple controlling ways and it is a free app in play store but you can purchase cars using your google play account if you want to have fun then ypu can use this app its very fun and useful to spend time its a good app and a game there are more versions of this app like dr driving 2 its also so good