Period Tracker, PCOS Fertility

Private period, cycle, PCOS & fertility tracker. Offline. Your device only.

Private period tracker. Fully offline. No account. No cloud.

Lunaire Cycle Tracker is a private, offline period and cycle tracker built for people who don't want their menstrual data stored on someone else's server. Log periods, ovulation, PCOS symptoms, BBT, fertility signs, mood and pain — all stored only on your device. No sign-up. No sync. No tracking. No ads.

WHAT YOU CAN TRACK
• Period start, end, flow & clotting
• Cycle length, regularity & predictions
• Fertile window & ovulation
• BBT (basal body temperature) with charting
• Cervical mucus & cervical position
• PCOS symptoms — acne, hair changes, weight, mood
• PMS & premenstrual symptoms
• Cramps, headaches, bloating, breast tenderness
• Mood, energy & libido
• Sleep quality
• Medication adherence — birth control, HRT, metformin, spironolactone, inositol
• Supplements & vitamins
• Weight, exercise, food & drink
• Free-text notes for anything else that matters

PRIVACY-FIRST BY DESIGN
Your period, fertility and cycle data is some of the most personal information you generate. It doesn't belong on someone else's server.
✓ Everything stays on your device
✓ No account, no sign-up, no email
✓ No cloud sync, no analytics, no ads
✓ Works fully offline — airplane mode is fine
✓ You own the data — back it up or delete it in one tap

YOUR CYCLE, NOT A BUSINESS MODEL
When a period app is free, you are usually the product. Lunaire isn't. There is no ad network, no data broker, no pharma partnership, no "anonymised research" pipeline. Your cycle data is used for one thing: helping you understand your cycle. That's it.

SEE THE PATTERN OF YOUR CYCLE
Lunaire predicts your fertile window and next period from your own data — using your logged cycles and, if you choose, your BBT readings. The more you log, the sharper the prediction. Insights, trends and a calendar view make it easy to spot cycle length drift, luteal-phase changes, PCOS irregularity or early signs that something is shifting.

PDF REPORTS FOR YOUR GP OR GYNAECOLOGIST
Generate a clean PDF summary of your cycle history, symptoms, BBT and medication timeline — share it with your GP, gynaecologist or fertility specialist in one tap. Months of tracked data is worth more than "I think my cycle is a bit irregular" in a ten-minute appointment.

BUILT FOR THE HUMAN, NOT THE MARKET
Most period apps optimise for engagement, ad revenue and data value. Lunaire Cycle Tracker optimises for one thing: a private, accurate, respectful place to log your cycle. No gamification. No daily streaks. No pink fluff. No fertility panic notifications. Just the tracker you actually wanted.

FREE FEATURES
• Unlimited period, symptom and mood logging
• Cycle and fertile-window prediction
• BBT charting
• 7-day history & trends
• Calendar view with cycle phase
• Medication & supplement adherence
• Weight, exercise, food & BBT logs
• Local-only storage

PREMIUM FEATURES
• Full 90-day history & trends
• Full 90-day PDF reports for your clinician
• Data export as CSV
• Backup & restore (local JSON file)

YOUR DATA, YOUR RULES
No subscriptions required to get the core experience. Premium unlocks longer history and clinician-ready reports — but the tracker itself is fully usable for free, forever, with no ads and no data collection.

Built in the UK by Lunaire Labs. Privacy-first symptom trackers for cycle, perimenopause, menopause, PMDD, endometriosis, thyroid, IBS, fibromyalgia, POTS and lupus.

Your cycle is yours. Keep it that way — privately, on your device.