Edit either field — the other updates to match. This only sets your anchor date; browsing below never changes it.
Finds the last day you fully completed and makes the next day today. Completed days keep their original dates; the missed gap is marked with × on the calendar, not erased.
These are independent — "Read" always uses the written translation, "Listen" always uses the chosen audio edition. Bible Gateway only narrates a few translations, so this is a fixed list rather than every translation above.
"Read" opens whichever app you pick here instead of Bible Gateway. YouVersion and Logos (ref.ly) are confirmed against official docs; WeDevote, Olive Tree, and e-Sword are based on informally documented links and may need the app installed on this device to work at all. Choosing an app other than Bible Gateway hides the translation and audio settings above, and the Listen button on each reading, since those are Bible Gateway-specific.
Saves your settings and every day's checkmarks to a file you keep — the only thing that survives clearing all site data in your browser, since nothing stored in the browser itself can protect against that.