By Olli Auvinen 24.05.2017

Wearable technology is everywhere now. You see an increasing number of activity trackers and smartwatches on people’s wrists. With just couple hundred euros, you can buy a device that counts your steps, measures heartbeat throughout the day, and gives you instructions on how to become more fit. When you wake up in the morning, you can even check how much REM sleep you got last night.