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The Gentleman's Assistant

A word before we begin.

To serve you with appropriate discretion, TOM requires a few pertinent details. Everything remains on your device. Naturally.

Average is 28. Most cycles range 21–35 days.
How many days the period typically lasts.

"This app offers guidance based on typical hormonal patterns. Human beings remain gloriously unpredictable. TOM is a helpful guide, not an exact science."