Is there an apple app for an iphone that lets you download free music?

I had an android and there was an app that allowed me to basically download free music and I switched to the iphone and I've lost all my music because apple doesn't allow you to put in a memory card.

Yes there's. It is called MP3 Music Downloader Free By WebTechies. MP3 Music Downloader is a free application which lets you download and play any number of mp3 songs from websites online. The application is absolutely free without any download restrictions. Download and play any number of legal mp3 songs directly from Internet.