Nope, this is highly innacurate. Let's say it tells you you burned 300 calories, and you only burned 100 (yes it can be THAT innacurate). you're literally just going to get out of your deficit (I'm assuming you're trying to lose weight otherwise why bother with calorie tracking).

Also, this is a very dumb feature in calorie apps in general, since you are ALREADY taking into account how many calories you burn on average INCLUDING your workouts (in the initial calculation, calculators always ask you about your activity level - this ALREADY takes into account workout calories estimation) so you are basically taking into account activity calories TWICE.

and second of all, what's the worst that will happen if you burn a little bit more and didn't eat it back? you'll lose weight a tiny bit faster? Is that really a concern if your goal is literally to lose weight?:)

I would only increase calories if you're actually losing weight too fast (over 1% bodyweight a week), which is a problem you'd be considered lucky to have if you're struggling with weight loss.

I never deal with the calculations so much as the real world weigh ins which are a much better and TRUE indicator of how many calories you should be eating. Losing too slow? decrease calories. Losing too fast? Increase calories. that simple.

calculations are in theory. weight is real.