I just wanna say that these are very valid points! It does make us seem less professional. And is potentially losing us some users.
We kind of scrambled that page together quickly because we wanted to get launch and get users as quickly as possible. Designing a pricing system may not take too long, but implementation would have delayed our launch date quite a bit and we really didn't want to delay the launch any further.
I think our lack of professionalism can also be an upside. It kind of allows me to create a personal relationship with some of our hardcore users and talk to them in order to guide the development direction of the app.
All in all, I appreciate the criticism!