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. 2020 Jul 15;8(7):e17552. doi: 10.2196/17552

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©Francisco Monteiro-Guerra, Gabriel Ruiz Signorelli, Shreya Tadas, Enrique Dorronzoro Zubiete, Octavio Rivera Romero, Luis Fernandez-Luque, Brian Caulfield. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 15.07.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR mHealth and uHealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.

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Screenshots of the main prototype screens. (a) Welcome screen; (b) profile screen; (c) coach (main) screen on session day; (d) coach (main) screen on a step goal day; (e) MyActivity screen, with information on the user’s current activity status; and (f) history screen, with information on past activity and access to the weekly summary reports.