Pretty good one
iPhone version is pretty good if you want to practice while traveling :) but comprehensive reading is useless as format is just too unfriendly to use...
IR is nightmare on iPhone so useless also. I think that is not the issue on iPad.
It is not iPhone 5 compatible although it could use the bigger screen pretty well...
Id like strength analysis by subcategories (like algebra, number properties etc) but still it gives you good idea where you are underperforming...
Dasha1405 about
The Official Guide for GMAT® Review 2017, v1