I've had amazing results with myfitnesspal (free). The only discipline you need is to enter the calories and keep under the daily calories it tells you. It's s

I've had amazing results with myfitnesspal (free). The only discipline you need is to enter the calories and keep under the daily calories it tells you. It's so scientific, linear and predictable that it makes you wonder why people bother with all these weight loss shenanigans when weight loss is as simple as calories in vs calories out (at least that's how it was in my case)