New application for learning english vocabulary

[tingtongapps]

Hi, my friends. We just published this new app for learning english language. It is using the spaced repetition system for learning. I would be grateful for your opinions and suggestions.

Its free app on google play:
https://play.google.com/store/apps/details?id=com.hepilabs.learnvocabulary

Thank you.

[Richard 4234]

Is there a harder version?

[Richard 4234]

Maybe for people that have about 12000 words vocabulary?