# Repit Fitness

> Repit Fitness is an AI-powered fitness app for tracking workouts, nutrition, and sleep. This site also hosts free fitness calculators and the Repit Academy — a library of clear, citable definitions of training and nutrition concepts.

## Calculators
- [TDEE Calculator](https://repitfitness.se/calculators/tdee): Estimate Total Daily Energy Expenditure (maintenance calories) with the Mifflin-St Jeor equation.
- [One-Rep Max Calculator](https://repitfitness.se/calculators/one-rep-max): Estimate 1RM from a multi-rep set using the Brzycki formula.
- [FFMI Calculator](https://repitfitness.se/calculators/ffmi): Fat-Free Mass Index with a built-in US Navy body-fat estimator.
- [Macro Calculator](https://repitfitness.se/calculators/macros): Split daily calories into protein, carbs, and fats by goal.

## Repit Academy
- [Academy Home](https://repitfitness.se/academy): Browse fitness and nutrition terms by category.
- [Nutrition](https://repitfitness.se/academy/category/nutrition): Calories, macros, and how food drives results.
- [Training](https://repitfitness.se/academy/category/training): Principles and methods for strength and muscle.
- [Body & Metrics](https://repitfitness.se/academy/category/metrics): Body composition and progress tracking.
- [Cardio & Conditioning](https://repitfitness.se/academy/category/cardio): Cardiovascular training and endurance.
- [Recovery](https://repitfitness.se/academy/category/recovery): Sleep, rest, and adaptation.
- [Supplements](https://repitfitness.se/academy/category/supplements): Evidence-based supplements.

## Key concepts
- [Caloric Surplus](https://repitfitness.se/academy/caloric-surplus): Eating more calories than you burn; required to gain weight and build muscle.
- [Caloric Deficit](https://repitfitness.se/academy/caloric-deficit): Eating fewer calories than you burn; the requirement for fat loss.
- [TDEE](https://repitfitness.se/academy/tdee): The total calories your body burns in a day.
- [Progressive Overload](https://repitfitness.se/academy/progressive-overload): Gradually increasing training demands to keep making gains.
- [Hypertrophy](https://repitfitness.se/academy/hypertrophy): The growth of muscle size from training and nutrition.
- [Macronutrients](https://repitfitness.se/academy/macronutrients): Protein, carbs, and fat — the three calorie-providing nutrients.

## App
- [Get the App](https://repitfitness.se/apps): Repit Fitness for iOS and Android.

## About
- [About Repit Fitness](https://repitfitness.se/about-us)
- [Contact](https://repitfitness.se/contact)