Reasons Within

Women's health, measured against you — not a male-dominant dataset or a textbook 28-day cycle. Your whole day read together, entirely on your iPhone.

Women's health has been an afterthought for too long — studied less, measured against male-dominant data, and squeezed into a "standard" 28-day cycle that plenty of women never had. Reasons Within is the correction.

This is your whole day, connected: sleep, training, recovery, steps, time in sunlight, heart rate, and how you actually feel — read together, and read through your cycle and your own baseline. See how a hard training week lands on your recovery. How your steps and your sunlight shape your sleep. How all of it rolls up into how you feel today.

Reasons Within reads your Apple Health data — sleep, heart, activity, cycle, and how you feel — and shows how they move together, measured against your own baseline rather than a population average. It learns your normal, including your own cycle length, instead of a textbook 28-day template.

Everything is analyzed on your iPhone. Your health data never leaves the device and is never sold or shared.

• Patterns in your own data — what tends to follow what, for your body specifically • Measured against you, not an average — your cycle is the lens, never a warning • Honest by design — findings start as "learning" and are only marked "confirmed" once they keep holding; they retire honestly when they stop being true • Recovery forecasts on training days — and they pause themselves if they stop being accurate • Home Screen widgets — Today, Bio Age, Activity, and Calories

Reasons Within is a self-knowledge tool that reflects your own data back to you. It is not a medical device and does not diagnose, treat, or give medical advice.