Before trainerize I used carb manager for logging since it's easy to use and FREE unlike my fitness pal. Myfitnesspals free options does not let ou customize or input macros which is the whole bases of my business, so unless clients already have it they dont use this app. Ever since I started using trainerize all I hear back is the logging is confusing and carb manager is easier, so most of my clients choose to use carb manager for logging which defeats the purpose of the app.