Apple Health vs Cromometer, slight difference in total calories burned

delimir

I am using Cronometer for some time, previously used another app. Cronometer is soo-much better!

I am training heavy and eat protein rich diet (approx. 3650-3700 calories/day). So my TEF is on a higher side and I am glad to see that Cronometer can reflect that instead using flat 10% formula to calculate TEF!!

I have some small doubt about total calories calculation in Cronometer VS Apple Health.

Here is one example:

Chronometer:

Total Calories Burned 3624cal

• BMR 1615 (this comes from the formula, OK for my specifics)
• Excercise 1108 (these are my daily tracked workouts from Apple Watch)
• Tracker Activity 424 (this comes from Apple Watch)
• TEF 477 (this comes from the formula and is based on my nutritional macro split)

Cronometer is synchronized with Apple Health and it all works perfectly on that side.
I ate 3872 calories and that was transfered to Apple Health properly.

As Apple Health doesn't have access to macros I expect total calories to be lower on Apple but maximum should be the TEF difference

So, that difference would be:

Apple TEF 10% calories consumed = 387 cals
Cronometer using proper TEF formula = 477 cals.

That means 90 cals less in Apple Health.

However, here is Apple data for the same day:

Apple Health/Apple Fitness

Total calories burned 3452

• Active Energy 1532 calories (this is in Cronometer Excercise + Tracker Activity)
• Resting Energy 1924 calories (this is obviously BMR + TEF)

There is difference of 172 calories. If 90cal difference comes from TEF it seems that Apple also estimate BMR lower for some 82cal?

It's not a big difference but curious to understand where is it coming from?

mdtempleton

I have a very similar issue. Cronometer seems to take all of the active calories from Apple Health and apply that to my daily calculation. As a result, I see a significant caloric deficit on most days. I am drinking enough water during the day but I am not overdoing it by any stretch. And, no... LOL! it's not because I am a bad calorie estimator - in fact I use as scale whenever I can. Still, I have trouble rationalizing what the scale says and what Cronometer is showing on many of the days I work out (which is almost every day doing at least something). I think it is a great program and by far my favorite of any that I have used. I would just like to be able to understand how to better rationalize the numbers.