My wife and I are borderline addicted to these. This year is the first that we're doing the actual Spartan series, but this is our 3rd year doing the 'mud' runs. Last year was Tough Mudder. This year we're going all out and aiming for the Spartan Trifecta. We're also gym rats, but it's awesome to see someone else…

Try searching the market. With over 600k apps, there's bound to be one that will work just like you want it. 'Silencr' and 'Profiles Free' might be a good place to start.

That Madeon remix. Just so good.

Doesn't work with bandcamp, blah.

I interviewed with the owner of the company first, and it went extremely well. He had been an IT professional some time before he was an owner of a company, but liked to stay current in the IT world. Because of this, he was competent in asking me the right questions and getting a good feel for me.