Open source SuperBetter
Make the apps (and maybe the website, separately?) open source in a collaborative setting like GitHub, where you can review contributions.
I love the idea, even though the Android app desperately needs work. I absolutely understand you can only do so much, but, as a developer, I would happily put in time to help add improvements, and other community members may, too.
I am also a developer who would like to contribute. I have Android experience and your Android app is seriously broken.