Everything is connected

Nutrition provides the foundation for energy and recovery. Sleep affects stress levels and performance. Activity increases calorie expenditure and changes nutrient needs. Water and caffeine balance directly impact sleep and recovery.

  • Nutrition
  • Sleep
  • Activity
KI-gestützte Essensanalyse – Calo One Kalorienrechner App

AI-powered meal analysis

Just snap a photo – Calo One recognizes foods, calculates calories and macros, and saves you manual logging.

Dynamische Kalorienziele – Kaloriendefizit Rechner App

Dynamic nutrition goals

Protein needs and calorie targets adapt automatically to activity, goals and your profile – for optimal recovery and muscle growth.

Schlafanalyse – Calo One App

Sleep analysis

In-depth sleep insights: Sleep Score from REM/Deep/Core, HRV, resting heart rate and respiratory rate. Cycle visualization, timeline & modern charts. Export & AI-generated reports.

Key features

Full control over calories, sleep, stress, hydration and training – including personalized insights.

  • Calorie and nutrient tracking

    Keep track of calorie balance, macros and micros – incl. integration of workouts and BMR.

  • Personalized sleep tracking

    Core sleep, deep sleep, REM, wake phases and a Sleep Quality Score for your recovery.

  • Stress & energy monitoring

    Live stress timeline, daily summary, and strain & energy scores to prevent overload.

  • Hydration & caffeine balance

    Water tracking with daily goals and a caffeine calculator – understand the impact on your sleep.

  • Workout and heart rate analysis

    Detailed training analysis: heart rate zones, strain and a workout effort score.

  • Personalized insights & recommendations

    Concrete tips in everyday language – e.g. "More sleep improves your recovery."

Calo One – Your Smart Calorie Calculator & Nutrition Companion

Calculate, track and understand your calorie needs – that's what makes Calo One the most comprehensive nutrition app for iOS. Whether you want to lose weight, build muscle or simply live healthier: Calo One gives you all the tools you need, scientifically backed and easy to use.

Calorie Calculator: Precise Calculation of Your Calorie Needs

Calo One's built-in calorie calculator uses the proven Mifflin-St Jeor formula to determine your personal Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE). Unlike simple online calculators, Calo One dynamically adjusts your goals based on your daily activity, sleep and stress levels.

Want to calculate your calorie needs right now? Use our free Calorie Needs Calculator – get your personal BMR and TDEE in seconds.

Calorie Deficit Calculator App – Lose Weight Systematically

Calo One is more than a classic calorie deficit calculator: the app analyses how much energy you actually burn each day and automatically adjusts your calorie target. This helps you avoid common mistakes like too large a deficit (muscle loss) or too small a deficit (no progress). The result: sustainable weight loss without the yo-yo effect.

Calorie Tables: Calories in Foods at a Glance

In addition to the app, caloone.de offers comprehensive calorie tables for all common food groups:

Why Calo One Is More Than a Calorie Calculator

Nutrition is only part of the puzzle. Calo One connects your calorie calculator with sleep tracking, stress monitoring and heart rate analysis – because poor sleep raises cortisol, increases hunger and alters metabolism. Calo One makes these connections visible and gives you concrete recommendations.

Start today: Download Calo One for free on the App Store and calculate your personal calorie needs – directly on your iPhone.

Try Calo One now

Start your smart path to balance of body and mind – with AI support.