Use your calendar tool to edit your period dates easily.
• Select "Calendar" from the bottom navigation bar.
• Choose the date you wish to edit.
• Tap the "Period" data category located below the calendar to access your data logging page.
• In the "period" section, enter "nothing" to remove period data or "period" to add period data. You can also include flow details or change a period to "spotting."
• Tap "Save" in the top right corner to save your changes. 

To edit additional period dates, use the arrows to the left and right of the date at the top of the screen to navigate to the next or previous date.