I guess because the apps are optimized to look nice, as opposed to being ergonomic and functional.
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).
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....