Did you know that the average person needs 150 minutes of moderate aerobic activity or 75 minutes of intense exercise, as well as twice-a-week strength training sessions, per week? The Mayo Clinic has found this to be the recommended amount of physical activity for healthy adults.

But what if you don’t even have an hour to spare? Don’t fret. Shortcuts are okay. A study published in the American College of Sports Medicine’s Health & Fitness Journal says you can combine both into one seven-minute exercise, which you can do three to four times a week. Popularly known as high-intensity interval training (HIIT), this speedy workout has changed the way people exercise, and squeeze a sweat sesh into their packed schedules. Lucky for us, app developers have been quick to jump on this fitness trend.

Click through the gallery to find out which apps suit newbies, and which ones are best for fitness buffs.

(Image edited by Mike Dee)