Are expensive fitness trackers and sports watches worth the money? Investigation reveals which ones are the most accurate...

Are expensive fitness trackers and sports watches worth the money? Or can a free app provide all the data you need to track your fitness goals?

As seen on - http://www.dailymail.co.uk/health/article-3390533/Are-expensive-fitness-trackers-sports-watches-worth-money-Investigation-reveals-ones-accurate.html