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so my apps hat you can search on youtube and when you open a video you can download it to mp3 file and the file are stored on the app user can have playlist and play song on multi task. so you can with the app convert the youtube video to mp3 file and store it on tap my download and user play song offline the language of the app will be french i will tell you the name of all tabs i can send you french translation.
Price : 500$..
and time : 5 days ( winner bidder will get more 6 task on ios after finish it with time line. )