Your current cycle in brief
Period start0.8 days before New Moon
Full Moon timingCycle Day 17
Reflections4 days
Lunar menstrual rhythm
Menstrual Cycle & Moon Cycle
Record your menstrual cycle, follow the Moon through every day, and build a personal history that reveals how your cycle moves with the lunar rhythm.
$14.98 / month
How Menstrual Cycle & Moon Cycle works
Build your personal menstrual + lunar history
Menstrual Cycle & Moon Cycle brings your menstrual cycle, the Moon and your own daily reflections into one timeline. You record the first and last day of your period, optionally note how you feel, and the service builds a personal history that becomes more meaningful with every completed cycle.
Record your period→Follow cycle + Moon→Add reflections→Complete a cycle→Receive a report→Build your lunar pattern
1
Start with your cycle
Enter the first day of your most recent period, your usual cycle length, your usual period length and your location. Your usual lengths are only starting estimates; your real averages update from the periods you record.
2
Record each new period
When menstrual bleeding begins, record “My period started”. That date becomes Cycle Day 1. When bleeding finishes, record “My period ended” so your period length stays accurate.
3
The Moon is tracked automatically
You never need to enter lunar data. Every calendar day carries its Moon phase, illumination and position within the lunar cycle, so your menstrual history can be viewed beside the Moon.
4
Add Daily Reflections
Whenever you want, record mood, energy, sensitivity, sleep, physical feelings, flow and personal notes. Your saved state appears back in the calendar and can be opened and edited later.
5
Receive your first report
Your first Monthly Insight appears after one complete menstrual cycle. When the next period begins, the previous cycle closes and its lunar alignment can be summarized.
6
See patterns grow over time
After several cycles, your reports and Lunar Alignment Wheel can show whether period starts repeatedly fall near New Moon, Full Moon, waxing Moon, waning Moon, or shift between different lunar regions.
Start your own Menstrual Cycle & Moon Cycle history.
Sign in to unlock
Unlock the tool to record your real menstrual cycle, save Daily Reflections, edit past entries, receive Monthly Insights and build your personal Lunar Alignment Wheel.
Your rhythm dashboard
Today, in one view
Your menstrual cycle, Moon position and recent wellbeing move together here.
Day 29Menstrual cycle
Current MoonWaxing CrescentMoon day 4.6 / 29.53
Cycle progressDay 29 / ~29100% of estimated cycle
Energy todayNot loggedAdd a Daily Reflection
Pattern history5 cyclesEarly recurring pattern
Energy trendLast 4 reflections
Today’s wellbeing1–5 scale
Your personal signals
What matters right now
Your wellbeing signal
Lowest energyDay 1 · 2/5
Highest energyDay 2 · 4/5
Personal baseline3.0/5 energy
Period onset + New Moon proximity + lower energy
This combined pattern needs more cycles with Daily Reflections.
Emerging
Why am I seeing this? ↗
- Period onset was within ±3 days of New Moon.
- Average energy on Cycle Days 1–3 was below your personal energy baseline.
- Only cycles containing energy reflections in the first 3 days are included.
Explore deeper patterns Pattern Explorer · baseline · heatmap · year view
Pattern Explorer
Compare your own data
Choose one wellbeing signal and compare it with menstrual timing or lunar position.
with
Personal baseline
Your normal, based on your own history
Average cycle29.4 days
Average period5.0 days
Average energy3.0/5
Average sensitivity3.0/5
Reflections used4
Your Cycle Heatmap
Wellbeing by cycle day
Darker cells indicate a higher recorded value. The Moon row shows the Moon phase for those days in your current cycle.
Cycle Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Energy
2.0
4.0
2.0
4.0
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·
·
·
·
·
·
·
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Sleep
2.0
3.0
2.0
3.0
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·
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·
·
·
·
·
·
·
·
·
·
·
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Sensitivity
4.0
2.0
4.0
2.0
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·
·
·
·
·
·
·
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Symptoms
0.0
0.0
0.0
0.0
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·
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Current Moon
N
N
N
W
W
W
W
F
F
F
F
W
W
W
F
F
F
F
W
W
W
W
L
L
L
W
W
W
W
N
Year View
How your period start moves through the Moon cycle
Each dot is one recorded period start. A cluster in a similar part of the line suggests a recurring lunar position; movement across the line shows drift.
MarNew Moon
-0.2d
AprNew Moon
-0.7d
MayNew Moon
-0.2d
JunNew Moon
-0.8d
JulNew Moon
-0.3d
AugNew Moon
-0.8d
Today
Your day at a glance
September 15, 2026
Waxing Crescent · 14.3%
What appears here after you start?
Your current cycle day, estimated next period, personal average cycle length, shortest and longest recorded cycles, current lunar pattern and today’s Moon phase appear together in one view.
My period started
Use this on the first day of menstrual bleeding. It starts a new menstrual cycle and, when there is a previous cycle, closes it for reporting.
My period ended
Mark the final day of bleeding so your period length and history stay accurate.
Moon data is automatic
The Moon phase and illumination are calculated for you; you do not need to enter lunar information.
Daily reflection
How do you feel today?
Daily Reflection adds your own experience to the menstrual + lunar timeline. It is optional: record only what feels useful, and return later to edit any saved day.
You do not have to check in every day.
Daily Reflection is optional. You can record only the days that matter to you, and you do not need to complete every field.
Mood
Choose up to three moods such as Calm, Good, Emotional, Low, Irritable or Anxious.
Energy + sensitivity
Use simple 1–5 scales so changes are easy to compare across your cycle.
Sleep + physical feelings
Record sleep, flow and physical experiences such as cramps, fatigue, headache, bloating or cravings.
Your own note
Add a personal note in your own words. It remains attached to that date in your history.
See it again in the calendar
Saved moods appear as small emoji, with energy and note indicators. Tap a recorded day to open its full details and edit the reflection if you want to change it.
Body + Moon history
June 2020
Your calendar keeps period days, cycle days, Moon phases and saved reflections on one timeline. Recorded days can be opened again later, so your history is not just stored — it stays readable.
What will your calendar show?
After unlocking, each recorded day can show your cycle day, period status, Moon phase and illumination. If you saved a Daily Reflection, mood emoji, energy and note indicators appear directly on the date. Tap that date to read the full reflection or edit it later.
Mon
Tue
Wed
Thu
Fri
Sat
Sun
🩸 Period◌ Predicted period😊 Mood recorded⚡ Energy✎ Personal note☾ Moon phase
Moon phases remain visible here. Personal cycle and reflection markers appear after you begin recording your own history.
Long-term lunar pattern
Lunar Alignment Wheel
The wheel places each recorded period start around the 29.53-day lunar cycle. It becomes more informative as your personal history grows.
New Moon
First Quarter
Full Moon
Last Quarter
Your pattern
appears here
What conclusions can the wheel help you see?
Over several cycles you can see whether period starts repeatedly occur near New Moon, Full Moon, the waxing half or the waning half of the lunar cycle — or whether they move around without one clear recurring cluster.
Your conclusions
Monthly Insights
This is where your written conclusions appear. Reports are created from completed menstrual cycles — not from calendar months.
After 1 completed cycleYour first Monthly Insight can be created when your next period begins and closes the previous cycle.
After about 3 cyclesYour recent cycle starts can begin forming an Emerging Lunar Pattern for comparison.
After 6+ cyclesYour longer history gives a stronger view of your personal Lunar Rhythm and whether it stays stable or shifts.
When exactly will you receive the first conclusion?
Suppose your period begins on August 26. That is the start of a menstrual cycle. When your next period begins, for example on September 24, the August 26 → September 23 cycle is complete. At that point Menstrual Cycle & Moon Cycle can create the first written Monthly Insight.
Moon at cycle start
The report looks at Moon phase, illumination, lunar position and how close the cycle start was to New Moon or Full Moon.
Waxing or waning
It records which half of the lunar rhythm your period start occurred within and compares that with later cycles.
Your menstrual cycle facts
Cycle length, period length and the timing of successive period starts form the core menstrual history.
Your reflections as context
If you recorded mood, energy, sensitivity, sleep, physical feelings or notes, those observations can add personal context to the report.
Compare multiple cycles
As history grows, reports can describe whether several recent period starts are appearing in the same lunar region or shifting between regions.
Where do you read conclusions?
The latest written conclusion appears in Monthly Insight. Older cycle information remains available in History, while the Lunar Alignment Wheel gives the visual long-term view.
Your complete record
Cycle history
Your menstrual and lunar history grows cycle by cycle. Use the calendar for day-level details and this list for recorded period starts.
What stays in your history?
Recorded period starts and ends, cycle days, Moon phases, illumination, Daily Reflections and your completed Monthly Insights. Your history is designed to become more useful over months and years rather than disappearing after a short window.
Return to older months
Move backward in the calendar and reopen recorded days.
Edit old reflections
If you want to correct a mood, energy score or personal note, open that day and update it.
Keep the Moon beside the record
Each historical date keeps its lunar context so your cycle history remains connected to the Moon.
Calendar day
Day details
Your note