I used to count calories and got pretty good at keeping track of it in my head, hitting my goal each day. I've gotten a little lazier but roughly stick to plan with some exceptions on the weekend.
The Apple Watch addition is nice but I'm still unsure if most people will go through the effort of entering every meal and snack because once you miss one for the day, it breaks.
@rrhoover I should also mention that the next major feature I will be adding to this app is reminders. You'll be able to (optionally) configure notifications at breakfast, lunch, and dinner to remind you to enter your meal.
@bentossell, my use-case is someone who generally knows healthy food but needs an additional motivator to make healthy choices and doesn't want to spend the time required to make calorie counting work. (As Ryan noted, with Calorie Counting, if you miss a meal the whole system doesn't work.)
The psychological threat of having to click on that "bad" button if you have seconds at dinner, will encourage you to make healthier choices. Calorie counting uses the same approach. However, as I've mentioned, calorie counting takes more time... (Although, I shouldn't praise my competition here, calorie counting approaches do work well for people who don't know which foods are healthy since it provides them with an exact measure.)
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The 7 Second Diet
The 7 Second Diet