Quiet Ledger

Private, on-device cycle tracker

Set up your profile

Nothing here leaves your device. No account, no email, no server — just your browser's local storage. You can wipe it at any time from the Data & Privacy panel.

Your typical number of days from one period's start to the next.

Can suppress or delay ovulation, making timing estimates less reliable.
PMOS is associated with irregular or absent ovulation and fluctuating hormone levels, which can make hormone surges (like the LH surge that triggers ovulation) unpredictable in timing or absent in a given cycle. Standard calendar-based fertile window estimates are far less reliable with this profile.
Thyroid hormone imbalances can lengthen, shorten, or suppress cycles.
Can be associated with cycle irregularity and pain patterns that affect symptom-based tracking.
This will be marked as a Highly Variable Profile — the fertile-window estimate will be replaced with a wide "Unpredictable Zone," and confidence will be capped lower.

Current Status

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cycle day
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Log a period start date below to begin estimating your cycle.

Confidence Meter
Estimate confidence: —

Daily Variable Tracker

Log today, or pick another date to backfill.

Stress, illness/fever, poor sleep, and medication changes can all delay or suppress the LH surge that triggers ovulation, shifting your fertile window later than a standard calendar estimate would predict.
Saved.

Historical Analysis

Each row is a completed cycle, from one logged period start to the next.

No completed cycles yet — this fills in once you've logged at least two period start dates.

Data & Privacy Panel

Everything below acts only on the copy of data stored in this browser.

Export

Download everything as a file you control.

Import

Restore from a previously exported .json file.

Click or drop a .json export here

Print / Save as PDF

Prints just the Historical Analysis table, formatted for paper.

Wipe all data

Instantly and permanently erases this profile and every logged entry.