How do u use the app?

So I have been trying to find a free offline music app but I am tired of having to wait until they download and when they dont work I have to delete them ugh so annoying, one question can this app play offline with NOOO WIFI (NO INTERNET) (NOT BEING CONNECTED TO ANYTHING) and also how do u download music???

Yomyster about iMusic IE+, v1.3