High-tech sex toy that links to your smartphone to track every activity between the sheets

The wearable device 'lovely' can link with your phone and could improve your sex life. It measures top speed and calories burned and could revolutionise your sex life.

The one-size-fits-all gadget keeps an eye on your top speed, number of thrusts and even calories burned during sex sessions.

Named Lovely, it has built-in Bluetooth and uses the data to recommend 120 different positions to keep things steamy in the bedroom.

It is designed to fit snugly onto a penis but also vibrates and has a battery that lasts around seven hours.

In a promotional video, Reid Mahalko, a sex and relationship expert, said: "It doesn't just have to go on a penis.”

"You can put it on your fingers, you can use it on a toy on yourself.”

"It's really only going to be limited by the ideas that you come up with."

It also comes with a charging station and dual LEDs.The gadget is currently raising money on crowd funding site Indiegogo.