I am interested in using a physical activity tracker across a large population of children (aged 8-14), which would not only allow children to track their own activity and for researchers to implement behavior change techniques (goal setting etc), but also for researchers to collect the real-time data as well.
Does such technology exist or are current trackers reliant upon the participant to upload data to an app and then researchers access the data from a central point/hub?
Any guidance would be great