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. 2021 Jan 20;7:6. doi: 10.21037/mhealth-19-253

Table 2. Functionality criteria.

Criteria Definition Description
1. Parameter measures Deals with overall functionality, availability and relative accuracy Includes steps, sleep, elevation, intensity, activity recognition, heart rate, oxygen level, and GPS
2. Motivational features Deals with availability of motivational features to encourage usage Includes vibration, sounds or app notifications to encourage meeting goals, such as step count or sleep duration
3. Notifications Deals with availability of notification support Includes mobile notifications to wearable device and do not disturb mode
4. Clock Deals with availability of clock function on wearable device Includes glanceable vs. manually initiated (e.g., button press), and analog vs. digital
5. Availability of personal data inputs/reminders Deals with availability of adding personal data inputs and setting reminders Includes if reminder can be set on wearable and/or mobile device
6. Connectivity to other apps Deals with option to pair device or app with other 3rd party applications Includes popular fitness apps and social media