Reasons Within

Understand your body's patterns.

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.

It reads your Apple Health data — sleep, training, recovery, steps, time in sunlight, heart rate, and how you actually 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 template.

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

What it does

• Measured against you, not an average — your cycle is the lens, never a warning.
• Patterns in your own data — what tends to follow what, for your body specifically.
• Honest by design — findings start as "learning" and are confirmed only once they keep holding.
• Recovery forecasts on training days — which 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.