In between cramming for never-ending tests, going out with your classmates and campaigning for the student union, you still need to keep fit. The good news is, you don't have to do that last bit all by yourself. Plenty of smartwatches can stand in for your mom, reminding you to go take a walk after you've sat in front of your computer for too long. There's also gear that you can take with you on your runs to make the grueling exercise more tolerable. In curating this list, we thought not only about what could make your workouts more fun and productive, but also devices and services that help you stay on top of your fitness regimen. These include apps that help manage your diet or exercise plans, so you don't have to splurge on a whole new gadget. Some options are even free. Here's what we recommend.