Table 2.
Device requirements of the included mobile health tools (n=19).
| Device requirement and citation | Description of use | Frequency, n (%) |
| Display [37-59] | Used for presenting the mobile device’s user interface in visual and tactile form | 18 (95) |
| Internet connectivity [38,40,43-46,48,49,51,53-56,58] | Used for accessing web-based information, having voice and video calls, and sending and storing information via the web | 12 (63) |
| Audio [36,39,45,48,49,55,57] | Used for listening to multimedia content with sound, creating audio messages, and having voice calls | 6 (32) |
| Bluetooth [36,39,42,46,53] | Used for exchanging data over short distances between mobile devices and paired technologies | 5 (26) |
| Camera [37,43-45,48,49] | Used for having video calls and capturing still images | 5 (26) |
| Reminders [38,43,44,48,49,54] | Used for alerting users to participate in a planned activity | 5 (26) |
| Accelerometer [38,42,43,57] | Embedded in a smartphone or wearable (eg, smartwatch) and used for motion sensing | 4 (21) |
| Notifications [38,39,42,46] | Used for informing users of available mobile technology information updates via audio, visual, and tactile indicators | 4 (21) |
| Messaging [44,45,48,49] | Used for multimedia communication via the internet | 3 (16) |
| Cloud storage [38] | Used for data storage | 1 (5) |