MyFitnessPal's UI is pretty bad but seems to have decent data if you can find it.
Fitbit's UI is nice but the food database and lookup is atrocious.
For any tracking that doesn't require support database (like food calories), I switched to TapLog [0]; it's the only sane tracking app I've seen so far. It allows you to place buttons on your homescreen to track custom-defined categories (I use, among others, Expense, Weight, Sleep time). You can store a number, a rate (1-5) OR a text description. And that's it. You press the button, type in the quantity, press "Log" and you're done. And it allows you to export all data to CSV - for me it's the most important feature (and without it, I won't be using any kind of tracking app).
[0] - https://play.google.com/store/apps/details?id=com.waterbear....