Whether you’re a beginning runner or an expert, the variety of programs from Personal Running Trainer will whip you into shape fast. Just choose your distance (1 mile, 5K, 10K, half-marathon, or full marathon) and the app provides coaching instructions that are voiced over your own music. The coaching instructions strategically advise you when to run, when to change your pace, and when to rest. Even if you've never considered running a marathon, you'll cross the finish line with ease by the time you complete Personal Running Trainer's 16-week training program.