in my opinion if you wanna learn another language you have to watch films in that languages with subtitles in your language, than you can obviously use this app, you can listen to music from the country where this languace is spoken, I advice alsa think in that language I wanna say that I am italian and I don't know if the grammar rules in this message are right, but if you see any mistake please send me a message and say that, thanks

I am afraid there is no easy way. Just hard work and be smart. Watching movies, listening to music is a good way but if you watch and listen to crap... You are what you watch, listen or read.

Play audio tapes of words and sentences in both your target language and their translations into your native language while you sleep.

I think, to learn the grammatical roots and listening a lot!