BBT & Luteal Phase Support

Cycle Tracker

Predict your ovulation, fertile window, and next period. Add BBT data for even more precision.

Last Period Start Date

Average Cycle Length (days)

Luteal Phase (days, usually 14)

BBT Rise Date (optional)

Data stays on your device

Medical Disclaimer: Cycle predictions are estimates. BBT confirms ovulation after it occurs, not before. Consult your healthcare provider for fertility concerns.