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. 2021 Mar 26;7(3):e25859. doi: 10.2196/25859

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©Thomas Foster Scherr, Jenna Maria DeSousa, Carson Paige Moore, Austin Hardcastle, David Wilson Wright. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 26.03.2021.

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 Public Health and Surveillance, is properly cited. The complete bibliographic information, a link to the original publication on http://publichealth.jmir.org, as well as this copyright and license information must be included.

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Screenshots of the user statistics modal in MyCOVIDKey. Users were presented with statistics comparing their app use to that of the rest of the userbase along with their progress toward the maximum number of raffle points allowed each week.