You can keep track of spotting using the Spotting feature in the Menstruation section. On days that you observe spotting, go to the Data screen, scroll down to the Menstruation section, and tap the checkbox next to ‘Spotting’ to select it. To unselect it, tap the checkbox again.
Spotting will show up on your chart as red dots over the menstruation or cervical fluid data you entered for that day.
What spotting looks like on the chart