How do I create a to-do that repeats?

You can create a repeating to-do by following these steps:

Tap the '+' button (bottom right) on the to-do screen
Type in the to-do detail in the text box
Select who needs to action the to-do
Toggle the Deadline to the right to open the time configuration
Add the first 'Due by' date and time
Tap 'Never' in the Repeat section to open up the repeat options
Select your preferred frequency or tap 'Custom' for more options
Add an 'Alert'
Add the to-do to a 'List'
Tap 'ADD'

Please note, to keep the to-do list legible, Cupla will only display the next to-do due, with an arrowed circle on the right-hand side to depict the to-do is set on repeat. When you complete a to-do, the next one in the series automatically loads. You will however see all repeating to-do's in your calendar at all times.