What it does: This running app coaches users from couch to 5K (C25K, get it?) with an eight-week training program.
What it costs: Free for download; $4.99 for the pro edition
What sets it apart: It pairs with your Apple playlist or gives you the option to download the Zen Power Playlist, which further inspires an all-out push through your run. What’s more, once you wrap up the C25K program, you have the option to download the 10K, 13.1, or 26.2 trainer apps.