Why do calorie values differ between tracking apps (MyFitnessPal, Lifesum, YAZIO, FDDB …) and the MyFitCoach app?

In short: The data sources and calculation methods of the apps are not always identical. That’s why differences occur – this is normal and not a problem.

Incomplete or incorrect entries
In open food databases, macros and calories don’t always add up correctly or some information may be missing.

Different calorie factors (Atwater factors)
Some apps use rounded values (Protein/Carbs = 4 kcal, Fat = 9 kcal), while others use more precise factors (Protein/Carbs ≈ 4.1 kcal, Fat ≈ 9.3 kcal). This can quickly lead to a few percent difference. MFC uses the exact values.

Fiber & alcohol
Depending on the app, fiber (0–2 kcal/g depending on the approach) and alcohol (≈ 7 kcal/g) are included differently – or not at all – in the total calories.

Food labeling
Nutrition facts on packaging are legally allowed to deviate from exact values (e.g., due to tolerances in measurement or rounding).

Portion sizes & preparation
Raw vs. cooked, drained weight, different portion definitions – all of this changes the calculated calories.

It’s not a problem. The key is that you consistently reach your goals. You have two practical options:

1. Match calories between apps
If you want MFC and your tracking app to display the same calories:
– Adjust the carbs in your tracking app until the total calories match the MFC value.
– Background: Calories are simply the sum of protein, carbs, and fat.

2. Ignore calories, focus on macros
Simply focus on hitting your MFC macro targets. This automatically ensures you meet the desired energy intake – regardless of the calorie number shown in the other app.

⚡ Important: Consistency beats perfection. Choose one clear reference (e.g., MFC macros) and stick to it.