. 2022 Sep 2;5(3):e39851. doi: 10.2196/39851
©Eliane Boucher, Ryan Honomichl, Haley Ward, Tyler Powell, Sarah Elizabeth Stoeckl, Acacia Parks. Originally published in JMIR Aging (https://aging.jmir.org), 02.09.2022.
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Figure 1.
Screenshot of a Happify track on the smartphone app version.