Menstruation or Spotting?
Menstruation/Period marks the start of the new cycle and is when you will have moderate to heavy bleeding. It is important to add data of all the days of your period in order to keep track of exactly where you are in your cycle.
Spotting is when you only have very little blood in the middle of your cycle due to ovulation, or it can happen before/after your period. Spotting is a data entry point that is there for your own information, the app does not take this into consideration when determining your fertility status.