LunaCycleYOUR CYCLE, UNDERSTOODCycle overview✦
YOUR CYCLE
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Add your last period start date to begin.
Cycle day —Next period: —
Your cycle, at a glance
Log a period start to personalize your cycle view.
Estimates only · not contraceptionYOUR PERSONAL CYCLE SPACE
Know your rhythm.
Small notes today. Better patterns over time.
DAILY CHECK-IN
A little check-in
Anything to note?
This quick check-in updates today's entry and keeps other saved details.
A GENTLE INSIGHT
Your patterns will appear here as you log more cycles. Estimates become more useful with consistent records.
LunaCycle is a tracking and education tool, not a diagnosis or a contraceptive method.
YOUR HISTORY
Cycle calendar
Select a day to view or add a record.
Month Year
MonTueWedThuFriSatSun
Period loggedEstimated periodEstimated fertile window
SELECTED DAY
Today
No entry yet.
RECENT CYCLES
History
DAILY CHECK-IN
Log your day
Your entries stay on this device.
PATTERNS, NOT DIAGNOSES
Cycle insights
Your history, explained with care.
RECENT PATTERN
Cycle lengths
BODY & MOOD
Symptom patterns
These summaries show co-occurrence in your records, not proof that cycle phase caused a symptom.
Record symptoms over time to see recurring patterns.
PERSONALIZED
Health notes
TRENDS
Sleep, BBT and pain
ESTIMATES ONLY
Fertility window
Add period start dates to see a broad calendar estimate.
Ovulation timing can vary even in regular cycles. Do not use these dates to avoid pregnancy or to confirm pregnancy/ovulation.
PERSONAL HEALTH REPORT
Choose report dates
Only records within this range are included in the report. The print dialog lets you save it as a PDF.
Your report is generated in your browser. Choose “Save as PDF” in the print dialog.
YOUR SPACE
Settings
Control your data and experience.
YOUR PROFILE · STORED ON THIS DEVICE
Personal details
Optional. These details are saved only in this browser profile; LunaCycle does not create an account or verify identity.
Typical cycle lengthUsed as a starting estimate if history is limited.
Typical period lengthYour usual bleeding duration.
ThemeChoose your preferred appearance.
Passcode & encryptionEncrypts your entries on this device with a passcode (6+ characters). Forgotten passcodes can't be recovered; keep a backup.
Daily reminderChecked when the app is open. Browser notifications may require permission; reminders are not guaranteed while the app is closed.
Fertility estimatesHide the fertile-window estimates entirely.
PRIVACY & BACKUP
Your records stay here
This version stores entries in this browser on this device. Clearing browser data, uninstalling, or changing devices may erase them. Export a backup regularly.
OPTIONAL CLOUD SYNC
Encrypted online backup
Syncs only while you're online. Data is encrypted on this device with your passphrase before upload, so the server can't read it, and a lost passphrase can't be recovered. Use a long passphrase (4+ random words). "Delete all my data" only clears this device.
HEALTH & SAFETY
When to seek help
Consider speaking with a qualified clinician about persistent cycle changes, bleeding between periods, or pain that disrupts daily life. Seek urgent care for very heavy bleeding with faintness, severe sudden pelvic pain, or possible pregnancy with pain or bleeding.
Cycle guidance is educational and is not a substitute for medical advice.
LEARN
Women's health learning centre
Short, reviewed educational guides about periods, symptoms, fertility and when to seek care.
ABOUT
LunaCycle
Version 1.3 · Private cycle tracking for everyday wellbeing.
LEARN WITH CARE
Health learning centre
Clear, gentle education. Not a diagnosis.
01 · THE MENSTRUAL CYCLE
What is a cycle?
A menstrual cycle is counted from the first day of one period to the first day of the next. Cycle length and bleeding can vary between people and from month to month.
Track your own dates rather than assuming every cycle is 28 days.
02 · SYMPTOMS
Understanding symptoms
Cramps, headaches, changes in mood, bloating and fatigue can occur around menstruation. A diary can help you describe patterns to a healthcare professional, but it cannot identify the cause on its own.
Seek medical advice if symptoms are new, persistent, worsening or interfere with daily activities.
03 · FERTILITY
Fertility estimates have limits
Ovulation timing can shift even in people with usually regular cycles. Calendar predictions cannot reliably identify every fertile day and should not be used as contraception or to confirm pregnancy.
If pregnancy is possible and a period is late, consider an appropriate pregnancy test.
04 · WHEN TO GET HELP
Know when to seek care
Consider speaking with a qualified clinician about repeated major cycle changes, bleeding between periods, or pain that disrupts daily life. Seek urgent care for severe sudden pelvic pain, faintness with very heavy bleeding, or possible pregnancy with pain or bleeding.
05 · RECORDS & PRIVACY
Your health data belongs to you
Keep backups somewhere private. Exported reports and JSON files may be readable by anyone who can access them unless you choose encrypted backup. Never share your passcode or backup passphrase.
Educational content only. This learning centre is not a substitute for personalized medical advice.