Overall very good, but needs some tweaks.

Ive been using knowji for about 6months now and i have no issue with it, the app is well designed and is very effective for learning and memorizing new words. I know that my suggestion would be somehow irrelevant to the apps main function which is to learn new words, but i believe it would be perfect if the developers would arrange a method for using the new words in sentences to reinforce the learned words. I wanted to give the app 5 stars as it deserves it, but the fact that you can not sync your progress between devices or somehow backup your progress, made me to think twice and request developers to add syncing feature.

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