After a few months of testing the app and gathering feedback from my friends, I decided to publish the app somewhen in September or October. In order to do that, I'll need a more serious landing page.
The new landing page is somewhat short, I don't have much time to spend on it, but I know it is important. I decided to go with the simple landing page approach: minimal info, try to explain clearly, no scrolling needed.
I posted a few posts on IH to gather feedback: