Storing Spotify music on iPhone for free?

I have a Spotify account on my computer, and was wondering if there was a way I could sync my phone to this account without having to pay for a Spotify account but still keeping the songs on my phone. Sort of confusing, but thanks to anyone who can help!

There's absolutely no way unless you get the 9.99 plan. The free account and the 4.99 account are computer only.