You really should study some books about nutrition so you know what you are doing. Protein supplements are a mixture of powdered milk, soy flour, sugar and flavor costing about $1.25 for as much protein as you get in a quarter's worth of milk. Any diet is usually a waste of effort just because there is so much confusion in dieting, as you have noticed. When you study nutrition you can choose what you need from what's available, no confusion.
cronometer.com/ (I haven't tried the software.)