Great app. Been using it for years. Recently I had it upgraded to premium version.
The feature that I love most is the "favorite" function which enables to save all the vocabulary that I love and need to get back on.
For someone whose English is not their first language and who is a geek for vocabulary. I assure you that youll get frustrated with the word challenge game. But still it is sooo much fun.
One little malfunction in my case, the pronunciation button next to the word does not work in my phone. Please help fix it for me.
All in all, it is a fantastic app.