What are the best free apps available in the App Store for learning Spanish?

I was searching apps to learn Spanish on my iPhone, I saw a couple of interest and looked at them but wanted a free app, I then found I would need Podcast app to listen to them - However, having decided against them, they are still showing up on my account, and I can't afford to pay for anything at the moment. As you can tell, I am a bit of a novice at this and could do with some advice please. Thank you.

[Re-Titled by Moderator]

Original Title: Searching apps but decided against purchasing