The BMI calculator & body tracker in one simple app
Calculate your BMI instantly and track real changes in your body over time — weight, body fat percentage, body measurements, goals, and before & after progress photos, all in one place.
Download BMI Calculator & Body Tracker
Free on the App Store for iPhone and iPad. No ads, ever.
See the app in action
Every tool you need to follow your body’s progress — BMI, weight, body fat, measurements, and photos.
How it works
No complicated setup, crowded dashboards, or unnecessary steps — just three simple habits.
Calculate your BMI
Enter your height and weight in metric or imperial units and instantly see your BMI value and category — then save it to build your history.
Log your body data
Record weight, body fat percentage, and measurements like waist, chest, hips, biceps, thighs, calves, and neck. Add progress photos as you go.
Watch your progress
Set a target weight and follow clear charts, trends, and side-by-side photo comparisons on the statistics dashboard until you reach your goal.
BMI calculator & history
See your BMI category instantly and review previous records and trends as your weight changes.
9 body measurements
Waist, chest, hips, biceps, thighs, calves, neck, weight, and body fat percentage — each tracked separately.
Weight goal tracking
Set a target weight, see how much remains, and follow visual progress charts that keep you motivated.
Before & after photos
Compare progress photos side by side together with your weight, BMI, body fat, and measurement changes.
Statistics dashboard
One clear overview of your current weight, BMI, body fat, measurements, recent changes, and goal progress.
Completely ad‑free
No advertisements in the app. Focus on your measurements, goals, and progress without interruptions.
Guides: track your body the right way
Practical, no-nonsense answers to the most common BMI, measurement, and progress-tracking questions.
How to Calculate BMI
The BMI formula in metric and imperial units, with worked examples and what your result means.
Healthy BMI Range & Chart
The adult BMI chart explained — underweight, healthy, overweight, and obesity ranges, and BMI’s limits.
How to Take Body Measurements
Where and how to measure your waist, chest, hips, arms, and legs — accurately and consistently.
How to Track Weight Loss Progress
Why the scale alone misleads, and the five signals that show real progress week to week.
How to Take Progress Photos
A repeatable setup for before-and-after photos that actually show how your body is changing.
Body Fat Percentage Guide
How to estimate body fat at home, typical ranges, and how to track it meaningfully over time.