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. 2023 Jun 23;25:e41881. doi: 10.2196/41881

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©Paula Massa, Dulce Aurélia de Souza Ferraz, Laio Magno, Ana Paula Silva, Marília Greco, Inês Dourado, Alexandre Grangeiro. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 23.06.2023.

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

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A: Setting a daily reminder for the user to take their pills. B: Amanda’s message to remind the user to take the pills. C: Setting a reminder that the pills are about to run out. PrEP: pre-exposure prophylaxis.