1. Year-over-year wearables spending doubles, according to NPD;NM,2016
2. Smartphone ownership and internet usage continues to climb in emerging economies;Pew Research Center,2016
3. Most popular sleep tracking gadget or app: sleep cycle;Henry,2013
4. General wellness: guidance for industry and food and drug administration staff;Services USDoHaH,2016
5. Insight C. US and UK wearable report,2016