If you have a smartwatch like Apple Watch, Samsung Watch and more, and are considering using the Elonga sensor, check out 
elonga.com/smartwatch where we cover the subject in detail.
The primary difference is that each service specializes in something completely different and 
They complement each other wonderfully. Elonga watch 
aims to measure the general state of the organism in 3 minutes in the morning - brings you unique objective data on stress level, regeneration, readiness and functional age. Conversely 
Smartwatch is used to measure activity throughout the day - show you how many steps you have skipped, burned calories, etc.
Elonga then synchronizes the measured data into a movement plan, through which he gives you recommendations of the most appropriate activities for each day.