Tsuki Period Diary

This app is a personal period tracking tool — not a medical device, not for diagnosis.

🗓 Cycle Tracking
• Log period start/end dates and flow intensity (5 levels)
• Automatic next period prediction
• Ovulation day & fertile window estimate
• Calendar view: period, predicted days & ovulation at a glance

📝 Daily Logging
• Symptoms: cramps, back pain, bloating, headache, fatigue & more
• Mood: 5 quick-select states
• Discharge observation, intimacy log & free notes

💡 Cycle Phase Tips
• Daily tips based on current phase (period / follicular / ovulation / luteal)
• Exercise intensity, nutrition & self-care suggestions

🔔 Personalized PMS Alerts
• Auto-enabled after 3 recorded cycles
• Finds your own symptom patterns — not generic textbook advice
• Early heads-up: "Based on your history, cramps usually start 2 days before your period."

💛 Irregular Cycle Support
• Auto-detects irregular cycles (PCOS, highly variable)
• Shows a date range instead of a false precise prediction
• Stops "period is late" notifications to reduce unnecessary anxiety
• Reverts to precise prediction once your cycle stabilizes

🔔 Reminders
• Period reminder N days before (default 2 days, adjustable)
• Fertile window start notification

🩺 Three Usage Modes (switch anytime)
• Understand: learn your own cycle rhythm
• Trying to conceive: fertile window, ovulation tips & TTC health reminders
• Contraceptive reference: Ogino method high-risk days on calendar
⚠️ Contraceptive reference is a statistical aid, not a medical contraceptive method.

📊 Cycle Statistics
• Last 6 cycles visualized with deviation markers
• Cycle regularity analysis (standard deviation)
• Average cycle length, period duration & symptom frequency

📄 PDF Export
• Cycle summary report to bring to your gynecologist

📚 Health Education Guide
• 6 chapters for pre-teens: what is menstruation, managing your first period
• My body is mine — recognizing inappropriate touch, saying no, getting help
• Growing up: contraception basics & STI prevention
• Based on Taiwan MOH & TAOG guidelines

📁 Backup / Restore
• Export & import in JSON format — your data, always yours

🔓 Premium (one-time purchase)
▸ Fertility Tracking
• BBT chart + auto-detect post-ovulation temperature rise
• Detailed discharge types (Billings: dry / creamy / egg white / watery)
• LH ovulation test result logging
• Fertility score (BBT + discharge + LH combined)

▸ Contraceptive Reference (Ogino Method)
• Personalized high-risk day calculation (requires 6+ months of data)

▸ Long-Term Analysis
• Cycle length trend chart (unlimited history, cross-year)
• Symptom correlation: find which symptoms appear on specific cycle days