I went to the RMV yesterday and besides the book I used this app. It honestly helped a lot. I passed my permit. Its a great way to review your answers and stay learning constantly about the road, signs etc. I also recommend to go to google and look for permit practice test. I used this 3methods (book,app & permit practice test) and Im glad I passed & hope the same for you.
Dfont. about DMV Ultimate Test Prep 2021