No, I didn't at that time. An app like one you mention would have to observe you first and see which foods give you what amount of energy, as your body is cherr

No, I didn't at that time. An app like one you mention would have to observe you first and see which foods give you what amount of energy, as your body is cherry-picking compatible food to some extent and burning rate is highly individual, probably even depending on your gut bacteria and how they pre-process your food. What works for one person won't for another :(