Is there any books or app that can improve our vocabulary
Thanks,
Azim
Norman Lewis book For Vocabulary and Grammar is topclass which has set of all words and meanings and usage very helpful for all competitive exams.
Studnets can also download official GMAT app for verbal improvement.
There are varuous other books Like "Cambridge preparation for TOEFl Test" which is all in Onebook for Verbal Ability and Vocabulary .