* SnoreLab & SnoreGym. My partner told me I was snoring and waking her up. Well, this app made it easy to collect data on that and then perform experiments in how to reduce my snoring. I now have a pretty great regiment and get a lot better sleep.
* LoseIt! A calorie tracker with a great library of foods. You can also track your weight and the premium subscription lets you track a lot more like body fat percentage (you'll need to get this professionally measured), water intake, and a lot more. You could do this yourself, but there are a lot of convenience features like creating recipes, seeing graphs of your weight overtime and getting estimates of how long it will take you to reach your goals, given your behaviors. I've used it multiple times during different periods of weight loss, so it has years of my weight history in it.
* SoundHound + Shazam. "What's this song? I love it!" Well now you know what it is and it's in your library. beautiful.
* Music, podcast, and audiobook apps. What's not to love?
* YouCut video editor. Got a little time and want to be creative? Combine with some other video effect apps and some of your own video or content downloaded from Reddit (I find I can download anything when I visit in browser) and you've got a nice little craft.
* Stellarium. I want to use this one more than I do. It's an AR star map. You calibrate it and then it shows you where in 3D the Planets and constellations are. As a city dweller I feel really disconnected from the night sky, so I downloaded this one.
--
I will say that specifically on the toilet I have challenged myself to write instead of consume. Write what? Anything. Just write more. Open up an email to myself and... start writing.