Want to Torch Calories at Home? Try a HIIT Workout From One of These Top-Rated Apps

Cost: Free; 7 Club subscriptions start at $10 per month

Seven is a fan favorite, and for good reason. The app's intense, seven-minute workouts are tailored to your goals (you'll choose from getting fit, getting strong, or losing weight), and you also have the flexibility to create your own workouts. The premium version gives you access to the complete library of exercises, as well as personalized plans and support from a certified trainer.