Peloton App ($13 per month)
"Signing up for the Peloton app one year ago was truly one of the best decisions I've made for at-home workouts. I love the fact that you can stream a range of classes varying in level and length — HIIT, dance, core, strength, etc. — not just the more well-known bike and treadmill workouts that are equally as great. They're all taught by inspiring certified trainers, too. Right now, Peloton is offering a 30-day free trial, but you can offer to pay for someone's first few months as a gift!" — Sam Brodsky, assistant editor, Fitness