Repeat Interval: Custom/cyclic rolling schedules (e.g., for shift work)

While many people work a standard 5/2 schedule, a huge number of users work in custom rolling shifts, such as 3-on/3-off (a 6-day cycle) or 2-on/2-off (a 4-day cycle). For an app that aims to be the most flexible and customizable on the market, having the option to set a custom, repeating cyclic schedule (instead of being strictly tied to a 7-day week) would be a game-changer.