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. 2022 Oct 4;10(10):e35896. doi: 10.2196/35896

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©Luisa Torres, Joy L Lee, Seho Park, R Christian Di Lorenzo, Jonathan P Branam, Shelagh A Fraser, Benjamin A Salisbury. Originally published in JMIR mHealth and uHealth (https://mhealth.jmir.org), 04.10.2022.

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 https://mhealth.jmir.org/, as well as this copyright and license information must be included.

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User retention, calculated by different grace periods of inactivity. In total, 792,692 users were tracked starting from their first recorded fast. Grace periods extended out to 104 weeks for the unlimited definition.