As the title , I’ve found a useful app on Google play since months ago.
I think it could help you boost your vocabulary anytime , anywhere that you don’t have your computer or laptop with you to log in Lingq.
Fun Easy Learn:
https://play.google.com/store/apps/developer?id=Fun+Easy+Learn&hl=en
The developer provide 28 versions for selected languages .
And each version has built-in translations of each other language, and there would be correspondent sound track to each word.
As you download the English version , you can choose French , Spanish , Russian …and so on as your interface language.
For every word learned in a category , you’ll be transferred to do several kinds of tests , including multiple choice test of listening and spelling test and so on.
Hope this content would help you out.