I am feeling really sorry if you see my posts that way, for I had no intention to bring yout project down, or screaming "don't need another app" from the top of my lung. All I intentioned is to point out what might be on readers mind that they're maybe too afraid to ask, or they're choose not to post either because they don't have an account here or they prefer posting is such a burdensome, and decide to leave their interest on this project because they can't find the info they seek, which is probably: what really differentiate you from other app? Why don't I just use this free app? What make adamant so special? And so on.

You have a table explaining this, I know, but I also know that there are a lot of questions that can't be answered by those tables. My question for instance. You are a paid service, and in my humble opinion, people would try to use alternatives, combining this free service plus that free method, trying this and that, before they decide (or learn) to try yours. My posts was intended to point out what's on customers mind, what they try to figure, and by your explanation, helps them to understand, or decide, or even compel them.

I actually still have some other questions to ask, another why-not-this-method-or-that-way posts, because after all, hey, I'm an ordinary user too, so probably what's on my mind is what on a lot of other people's mind too. But it's ok, now I am understand that this app is not for everybody.