How to transfer music from an app(downloader) you have on your iphone to itunes?

I have an app called downloader. I bought for a dollar. I have a lot of music and its taking up a lot of space on my iphone 5s. I would like to know how to move it to my itunes or something so i can put it on the actual music app that apple has.

Because the music is not purchased from iTunes store, you have to use some third party software to copy the music from your iPhone back to computer, here is a guide about how to transfer iPod/iPhone songs to iTunes, hope it helps you.

For purchased music from iTunes store, you can follow these steps.
1. Open up Itunes and Click on Itunes Store
2. Once you're in the Itunes Store look to right side of the screen and you should see the word "purchased". Click purchased and you'll be sent to a purchase screen.
3. Click on "All Songs" and then it will show all the songs you've downloaded. From there you just hit the button that looks like a cloud with an arrow on it, and it will download all the songs all over again.

I always use iPhone Transfer Platinum to export batch files like music, movies, ebooks and more from my iPhone 5s to iTunes in one click.