I love it but need few improvements.

I love this app because it improves your vocabs.
I just think there should be personal accounts that you can log in so when you get a new phone, you can study the same vocabs. I also think there should be "typed wrong" button because I sometimes type it wrong and its frustrating to type the word i got right again.

Leegaga about Knowji Vocab 7-10, SAT, GRE, ASVAB Audio Visual Vocabulary Flashcards with Spaced Repetition