A couple with runtastic apps and accessories to optimize its use. I put only 4 stars because I sent the first model purchased after recurrent difficulties bluetooth sync. I shot, I wonder about the life of the bracelet. However, the 2nd model works perfectly well for over a week. Regarding the monitoring of sleep, I regret that the smart alarm function has not been developed. In addition, graphics commenting on the nights passed "runtastic me" does not seem very satisfactory: the share is deep sleep (too) large relative to the share of light sleep.
