Luna - Period Tracker & Cycle

The private period tracker that maps your cycle to four seasons. Predict periods, ovulation & fertile days. Log symptoms & mood — 100% offline, no account.

Luna is a beautiful, private period tracker and ovulation calendar that maps your menstrual cycle to the four seasons — Winter, Spring, Summer, and Autumn — so you can understand your body's natural rhythm at a glance.

More than a period calendar, Luna predicts your next period, fertile window, and ovulation day, then shows you which phase you're in, what to expect, and how to make the most of each stage of your cycle.

FOUR-SEASON CYCLE PHASES Your cycle is more than just a period. Luna divides it into four distinct phases, each with its own energy, nutrition tips, and exercise guidance:

• Winter (Menstruation) — Rest and restore. Your body is shedding and renewing.
• Spring (Follicular) — Rising energy. A great time to start new projects and try new things.
• Summer (Ovulation) — Peak energy and confidence. You're at your most social and creative.
• Autumn (Luteal) — Winding down. Focus on completing tasks and preparing for rest.

DAILY LOGGING Track what matters to you, all in one place:

• Flow level (Heavy, Medium, Light, Spotting)
• Mood (Happy, Calm, Energetic, Anxious, Sad, Irritable)
• Symptoms (Cramps, Bloating, Headache, Fatigue, and more)
• Basal body temperature (BBT) for fertility awareness
• Weight and sleep tracking
• Personal notes

BEAUTIFUL CALENDAR See your entire cycle at a glance with color-coded phase markers. Tap any day to view or edit your log. Flow indicators and mood dots make patterns easy to spot.

INSIGHTS & TRENDS Understand your body better with:

• Cycle history with average lengths
• Top symptoms frequency
• Mood distribution
• BBT temperature trend chart
• Logging activity stats

SMART REMINDERS Never be caught off guard:

• Period reminder (configurable days before)
• Daily log reminder at your chosen time
• Pill reminder
• Ovulation reminder

TRYING TO CONCEIVE Enable TTC mode to see fertile window markers on your calendar, track basal body temperature, log intimacy, and get ovulation reminders.

PRIVACY FIRST

• 100% offline — your data stays on your device
• PIN & biometric lock
• No account required
• No data collection

EXPORT YOUR DATA

• CSV spreadsheet for personal analysis
• PDF cycle report for doctor visits
• Full backup and restore

Your cycle. Your seasons. Your Luna.