I have struggled to find a calorie tracker that is easy to use, has a good free version, and doesn't trigger any bad feelings towards food, calories, or my weight. My go-to is Lifesum. I do pay for the premium subscription but that is to get access to recipe ideas (full disclosure, I bought the subscription on sale!).

I track my calories, exercise, and water intake with this app and it syncs with Google Fit, Samsung Health, Withings, Runkeeper, and Fitbit.