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The leading BMI App – trusted by over 10 million users 

Reach your ideal weight – with ease and motivation

aktiBMI was developed for 3 target groups: 

Those who want to lose weight

Track your success
– step by step!

aktiBMI helps you stay motivated. Just enter your weight – the app tracks your progress and shows you exactly how far you’ve come, day by day.
Health-conscious users

Understand your body
– and stay in balance!

Track your BMI and weight regularly to maintain a healthy lifestyle. aktiBMI gives you insight into your long-term health data – simply and clearly.
Athletes & fitness-focused users

Push your limits – and measure real progress

With aktiBMI, you can track muscle mass, fat, and water levels. Perfect for anyone working towards defined training goals.
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Reach your Weight Goal - with aktiBMI

Your starting point.
Your journey. Your goal.

Your BMI is more than just a number. It’s your starting point, your orientation, your personal compass. With aktiBMI, you calculate your BMI in seconds – based on trusted WHO standards – and understand what your body really needs.
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Motivation
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Every step counts – visualize your victories

Your journey deserves to be seen. With aktiBMI’s weight diary, you don’t just enter numbers – you track victories. Every drop in weight, every milestone reached is visualized and celebrated. Because progress fuels motivation.

See what really changes – not just your weight

aktiBMI PRO gives you deeper insights: Track muscle mass, body fat, and water levels – and measure the changes that truly matter. For those who train with purpose and want to feel the difference in their body.
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Sport

Reach your target weight step by step 

Enter your desired weight and track your progress, one step at a time. aktiBMI keeps you motivated with small celebrations and encouraging messages. Every milestone you hit boosts your motivation and brings you closer to your goal.
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Report

Track your success – and share it with your doctor

With aktiBMI, you can export a full PDF of your progress – including BMI, weight changes, and body metrics. Perfect for your doctor, nutritionist or just for yourself. Stay informed and in control.
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Recommended by Doctors

"One of the best apps for documenting your weight loss journey"

aktiBMI is ideal for weight management – and highly suitable for medical monitoring. Its clear design and intuitive interface make it easy for anyone to use.

Dr. med. Dr. Gerhard Schenko Specialist in General Medicine & Diabetology
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Real stories. Real results.

★★★★★

More than 86,000 Ratings – 4.6 out of 5 Stars

★★★★★

Thanks to this app, I've lost 16 kg.

Thanks to this app, I've lost 16 kg. It shows my healthy BMI so I know I won't overdo it. Just 4 kg left to go. What I love most about it is that it congratulates me every time I lose weight. Try it out and you'll love it.

Iris
★★★★★

I lost about 31!!! kg. A huge thank you!

The success came as I wished! The app has helped me soooo much: since 2019 - about 31!!! kg. A huge thank you for that ❤

Marco
★★★★★

Very clear and also motivating

The app is really great, I've been using it for years and find it very clear and also motivating. I would give it 10 stars if I could.

Margit
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