BMIBees

Know your BMI and track it over time. Built and shipped by devShakib.

BMIBees calculates body mass index in metric or imperial units and keeps a history so the number becomes a trend rather than a one-off reading, with clear category bands and guidance on what each range means.

Tracking BMI over time is more defensible than reading it once, because the criticisms of the index — that it cannot separate muscle from fat, and that it was designed for populations rather than people — apply much less to a trend in one individual than to a single classification.

The charting decision that matters is the vertical axis. A range chosen tightly makes ordinary fluctuation look dramatic, and normal day-to-day variation in body weight is a kilogram or more from hydration alone. An axis that exaggerates noise turns a health tracker into a source of anxiety, which is the opposite of the intent.