Take control of your fitness journey with Rainb, the fast and simple way to calculate how many calories you burn during your workouts. Whether you're running, cycling, swimming, or doing home exercises, Rainb gives you instant results to stay on track with your fitness goals.

Just pick your activity, enter the time spent, and boom – your calories burned are calculated instantly.
✅ Popular Activities of Rainb Include:
> Choose from a wide range of workouts: running, walking, cycling, jump rope, push-ups, swimming, and more.
⏱ Instant Calorie Burn Calculator
> Quick and accurate – just enter your workout duration and get immediate results.
🎯 Beginner-Friendly Interface
> Clean design, easy-to-use dropdowns, and one-tap functionality for all fitness levels.
💡 Why Choose Rainb?
> Ideal for home workouts, gym routines, or outdoor training
> No login, no ads – just smooth, distraction-free performance
> Great for fitness tracking and calorie-conscious users
> Motivating design that keeps your routine engaging and consistent
Whether you’re just getting started or already living the fit life, Rainb helps you train smarter, track better, and stay motivated.
📥 Download Rainb now and burn smarter, not harder.