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. 2021 Oct 6;5(10):e31273. doi: 10.2196/31273

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©Charlotte Summers, Philip Wu, Alisdair J G Taylor. Originally published in JMIR Formative Research (https://formative.jmir.org), 06.10.2021.

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 Formative Research, is properly cited. The complete bibliographic information, a link to the original publication on https://formative.jmir.org, as well as this copyright and license information must be included.

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Scatter plot showing correlation between total time of engagement with the well-being function of the Gro Health app and pre-post test difference in PHQ-9 scores. PHQ-9: 9-item Patient Health Questionnaire.