Now, e-ciggy that tells you how much your life expectancy has increased with every puff

Researchers have come out with an e-cigarette Smokio that actually add years to your life each time you puff.

It works by hooking the device up to an app on your smartphone which captures your vitals every time you inhale, even when your phone is out of sight, Tech Crunch reported.

The app tracks how often you smoke and how much nicotine is currently in your body. It then shows you how much you've been smoking and how much that's cost you and then gives encouragement to cut down and eventually kick the habit altogether.

The app also shows you just how much you've increased your life expectancy by number of days by switching to an e-cigarette instead of smoking real cigarettes.

Smokio's app will also tell you how much you've saved by switching to its "smart" cigarette every time you use it. It's now sold in the US for about 80 dollars.