Cycle & Cosmos
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.
Build your personal menstrual + lunar history
Cycle & Cosmos 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.
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.
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.
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.
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.
Receive your first report
Your first Cycle & Moon Report appears after one complete menstrual cycle. When the next period begins, the previous cycle closes and its lunar alignment can be summarized.
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.
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.
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.
Mark the final day of bleeding so your period length and history stay accurate.
The Moon phase and illumination are calculated for you; you do not need to enter lunar information.
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.
Daily Reflection is optional. You can record only the days that matter to you, and you do not need to complete every field.
Choose up to three moods such as Calm, Good, Emotional, Low, Irritable or Anxious.
Use simple 1–5 scales so changes are easy to compare across your cycle.
Record sleep, flow and physical experiences such as cramps, fatigue, headache, bloating or cravings.
Add a personal note in your own words. It remains attached to that date in your history.
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.
July 2028
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.
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.
Moon phases remain visible here. Personal cycle and reflection markers appear after you begin recording your own history.
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.
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.
Cycle & Moon Reports
This is where your written conclusions appear. Reports are created from completed menstrual cycles — not from calendar months.
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 Cycle & Cosmos can create the first written Cycle & Moon Report.
The report looks at Moon phase, illumination, lunar position and how close the cycle start was to New Moon or Full Moon.
It records which half of the lunar rhythm your period start occurred within and compares that with later cycles.
Cycle length, period length and the timing of successive period starts form the core menstrual history.
If you recorded mood, energy, sensitivity, sleep, physical feelings or notes, those observations can add personal context to the report.
As history grows, reports can describe whether several recent period starts are appearing in the same lunar region or shifting between regions.
The latest written conclusion appears in Cycle Reports. Older cycle information remains available in History, while the Lunar Alignment Wheel gives the visual long-term view.
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.
Recorded period starts and ends, cycle days, Moon phases, illumination, Daily Reflections and your completed Cycle & Moon Reports. Your history is designed to become more useful over months and years rather than disappearing after a short window.
Move backward in the calendar and reopen recorded days.
If you want to correct a mood, energy score or personal note, open that day and update it.
Each historical date keeps its lunar context so your cycle history remains connected to the Moon.