Log each new cycle start date after your first cycle is set up so Home can update cycle day, phases, and next-event estimates. This article is about managing cycles with Track Period—not logging Period Flow as a daily symptom. It covers Track Period from the + menu, confirming saves, and what changes on Home—not first-time setup.
What you're logging
- Each log marks the first day of a new cycle—your bleeding start date on the calendar, not Period Flow intensity cards in Daily Tracking.
- The calendar shows a preview of phase colors before you save; nothing writes to your history until you tap Save.
- Cancel rolls back a preview you have not saved yet; Done closes the screen when there is no pending preview.
- Future dates cannot be selected—pick today or an earlier day only.
- Period Flow is separate—if you log flow on the first day of a predicted follicular phase, the app extends the menstrual phase and readjusts predicted phases to match.
Never set up your first period? See Entering your first period date in the related articles below.
From the + button on the tab bar
01
+
Tap the center + on the tab bar to open the add log options sheet.
02
Track Period
Select Track Period to open the period calendar.
Pick a start date and save
01
Calendar
Tap the first day your period started. Phase-colored dots preview your selection before you save. Future dates are not allowed in this mode.
02
Save
After a valid date is selected, tap Save. A Saved! confirmation appears. The screen stays open—tap Done when you are finished.
03
Cancel
When a preview is pending, the leading button reads Cancel. Tap it to roll back unsaved preview changes and close the calendar.
04
Done
When there is no unsaved preview, the leading button reads Done. Tap it to close without saving anything new.
After you save — Home
01
Phase name
The circular tracker on Home shows your current phase for the date you are viewing.
02
Day
The cycle day number below the phase name updates from your saved period history.
03
Next event line
The line under the tracker estimates your next ovulation or period—it is a forecast, not a medical prediction.
04
start new cycle
When you are viewing today late in the luteal phase, a start new cycle button may appear below the tracker. It logs today as a new period start immediately—no calendar preview.
✦Next ovulation and period lines are estimates—the app learns your cycle length as you log more periods. Logging at least two periods sharpens those predictions a lot.
🔒Period and cycle data stay on your device and sync through your private iCloud—they are not stored on Red Tent servers. Optional research data sharing is separate and revocable anytime in Settings.