Setting up next week
If you miss the review
Nothing breaks if you do not do the review on time. It simply waits.
What you will see
Your current week runs out, and there is no next week, because next week has not been created yet. Today says your plan has run out and offers Start a fresh week; the review keeps offering itself when you open the app, and a reminder notification nudges you if you have those turned on.
Doing it late
Open the app and take the prompt, or start it from the Next weekly review row on Today. The review works the same however late it is: confirm what happened, then create the new plan.
When you choose the start date, you can start the new week today rather than backdating it, so you are not paying for days that have already gone by.
Nothing is lost
Meals you marked during the week are still there. Your Insights for that week are still there. Bolus does not discard a week because it was reviewed late.
If there is nothing to review
If a week was on holiday, there is nothing to confirm and the review is short: you go more or less straight to setting up the next one. See holiday mode.
If you think a week is missing entirely, see no week or meals showing.