Download on App Store: https://itunes.apple.com/us/app/freestyle-timer/id1057212329?l=pl&ls=1&mt=8
Download it or git clone repo and you are done. This project has no 3rd party dependencies.
It's hard to test the app on simulator as it requires to have songs in local library. Timer can't be run when there is no music chosen or total song length is less than timer duration.