A new app using augmented reality (AR) aims to motivate people to get more active by showing, in real-time, what they would look like if they lost weight or gained muscle mass.

EnvisionBody uses optical tracking to capture the user's image, then processes it through an AR application, and displays the user's enhanced image on a screen.

The creators of the tech believe there will be various ways of utilising the software – such as an effective exercise motivational tool that interfaces with exercise equipment.

"We see it being used as a display wall-mounted screen for cosmetic surgeons, diet and weight loss or fitness centers," EnvisionBody said in a statement.

"EnvisionBody creates a fun, engaging experience by providing a real-time live video of your body that is enhanced the way you want to look.

"As if looking into a mirror, you can now see yourself with the body image you've always wanted – you can see your "after" right now! The application does not superimpose an image onto your live video feed, but it is your actual image that changes.

"You may want to see what you look like with a 20 per cent to 30 per cent reduction in weight and/or increased muscle mass in real-time."