[rjb]

Great design and the app looks dead simple, i.e. it is not scary looking, but I need a bit more information.

"Radio Silence lets you block internet access from any applications you would rather keep silent."

My applications have/need internet access? Why do I need to silence them?

Do not assume people already know why they need this. Find a good selling point to the above questions (privacy, right?) and drive it. You should then be able to charge at least $30.

I also feel like I would feel more confident in the product and the co. behind it, if I saw links that lead to things like contact, documentation and support. I do not want to be left out in the cold should I need help.

I hope this helps.