Good luck with your diet, man.
My wife and I use MyFitnessPal on our iPhones
which basically tracks the calories we consume.
Add in exercise and I lost 30 pounds, but added
a few over the summer with birthday parties, etc.
Back to tennis, walking and disciplined calorie
tracking for me.
A buddy of mine got taken off his depression meds
which he's been on for 20+ years after he went on
a Ketogenic diet and lost 24 pounds...
FWIW.