Log when bleeding starts and ends, plus the details you choose to keep.
PMOSense for variable cycles
Track irregular cycles beyond calendar predictions
When cycle timing changes, a fixed calendar can only tell part of the story. PMOSense helps you keep a record of what actually happens—your periods, signs and notes—so your history stays useful even when dates are hard to predict.
Free to use. No subscription required. Available on iPhone and iPad via the App Store, or as a web app in your browser.
Keep the full picture
When your cycle doesn’t follow the calendar
A variable cycle does not need to be squeezed into the same expected length each month. An irregular period tracker is most useful when it preserves the dates and details you recorded, while making clear that a future date is an estimate—not a certainty.
Keep body signals and daily context alongside the dates.
Look back across your own cycles, rather than one assumed average.
Use an organised history when you want to reflect or speak with a clinician.
Start with observations
Start with what actually happened
PMOSense is a place to record information, not a demand to track everything perfectly. Add the signals that are meaningful to you, when you have them.
Period start/end & flow
Symptoms
LH tests
BBT
Cervical fluid
Mood & stress
Medication & supplements
Notes
Your history, not a generic average
Build your own cycle history
Keeping previous cycle information together makes it easier to see the record you have created across days, weeks and cycles. That can be useful when patterns feel hard to remember, without claiming to explain why your cycle timing changes.
Your recorded history
- Dates and flow you logged
- Signs and symptoms you recorded
- Notes and daily context
- Patterns available to review over time
Future-facing context
- Period dates are estimates
- Fertility context uses available logged information
- New entries can change the context shown
- Predictions are not promises
One record, more context
Multiple signals in one place
A predicted date is not the only useful part of cycle tracking. Viewing period history, LH, BBT, cervical fluid and symptoms together can make your personal record easier to understand and discuss. It does not medically confirm ovulation.
Period historyLH trendsBBT patternsCervical fluidSymptomsNotes
When your cycles change
Bring a clearer history to appointments
A history of recorded cycles can make changes easier to recognise and organise for a conversation with a healthcare professional. PMOSense can create a Doctor Report with cycle history, symptoms, LH, BBT and logged patterns.
A related use case
Looking for PCOS-specific tracking?
PMOSense can support many kinds of variable cycle history. If you are looking for tracking in the specific context of PCOS or PMOS, see our PCOS cycle tracker overview.
Medical boundaries
Useful context, without medical certainty
PMOSense tracks the information you record and provides estimates and context from logged information.
It can help organise your cycle history, but it does not diagnose the reason for irregular cycles, diagnose PCOS or PMOS, medically confirm ovulation, or replace healthcare professionals.
FAQ
Questions about tracking unpredictable periods
Can I use PMOSense if my periods are irregular?
Yes. PMOSense is built to keep a record of periods and other cycle signals when timing is variable or difficult to predict.
Does PMOSense assume a 28-day cycle?
No. PMOSense keeps your logged history and provides context from the information available, rather than treating every cycle as the same length.
How does PMOSense predict my next period if my cycles vary?
Future period dates are estimates based on logged cycle information. They can change as you add more information and should not be treated as a promise.
What can I track besides my period?
You can record flow, symptoms, LH tests, BBT, cervical fluid, mood and stress, medication, supplements, notes and cycle history.
Can I track LH and BBT with irregular cycles?
Yes. PMOSense lets you keep LH tests and BBT alongside period history and other signs, so they are easier to review together.
Does PMOSense tell me exactly when I ovulate?
No. PMOSense provides estimates and fertility context from logged information; it does not medically confirm ovulation.
Can I take my cycle history to my doctor?
Yes. You can create a Doctor Report that organises your logged cycle history and patterns for a healthcare conversation.
Is PMOSense free?
PMOSense is currently free to use, with no subscription required.