Question 1

Is Vitalis a medical tool?

Accepted Answer

No. Vitalis is a fitness and wellness tracker for educational purposes. It does not diagnose conditions and is not a substitute for professional medical advice.

Question 2

How accurate is the body fat estimate?

Accepted Answer

The U.S. Navy circumference method typically lands within a few percentage points of more advanced methods when measurements are taken consistently. Use it to track direction over time rather than as an absolute value.

Question 3

Where is my data stored?

Accepted Answer

Everything stays in your browser's local storage on this device. There are no accounts, no servers, and no analytics on your measurements. Clearing your browser data removes your entries.

Question 4

How often should I measure?

Accepted Answer

Once every one to two weeks is plenty. Measure at the same time of day, ideally in the morning before eating, and in the same posture.

Question 5

Why does BMI say I'm overweight when I train regularly?

Accepted Answer

BMI only compares weight to height and cannot separate muscle from fat. Read it alongside your body fat percentage, FFMI, and waist-to-height ratio.

Question 6

Can I use imperial units?

Accepted Answer

Yes. Height accepts centimetres or feet and inches, weight accepts kilograms or pounds, and measurements accept centimetres or inches. Switching units converts your values automatically.

Question 7

Does it work offline?

Accepted Answer

Yes. Vitalis is installable and all calculations run locally, so it keeps working without a connection once loaded.