Ive tried those apps before. But i have learned my body well enough to know exactly how much I should eat based on what I do that day. I don't even count calories or eat salads and such.

I still eat what I like, I know mornings is when my body can run on less food, lunch is a little bigger and dinner I eat til I feel just a bit too full so hours after dinner I feel very satisfied.

But I also ride my bike 60-80 miles a week. usually right after dinner.

Im 5' 8 and weighed 207 pounds in April, today im 173 pounds. I drop 1-2 pounds per week like clock work. the great thing is i love riding and i dont get hungry and my fat is melting away. Just learn your own body and you wont need apps.