Ok, here are my thoughtso n the app.
This is a damn good idea. Can make life much eaiser for developers and such.
This app is way out to lunch on its 'remove ads' pricing. The cost (PER YEAR) is more than what my webhoster charges me and I get WAY LESS functionality from this app than I do from my webhoster. Seriously, I understand you need to make a living but you are trying to do it from just one app and that's so out of sync with how the online world really works.
A one time fee of $25 is reasonable. $50 is kinda pushing it too but $150 PER YEAR, not even gonna come close to me recommending this to any company I know.
Now, if you broke this up to a freebie with a support fee structure per year behind it, that would be more inline in how things work much better.
In any case. That's just my opinion. Take it for the feedback that it is.
Good luck with the plugin in either case.
https://wordpress.org/plugins/wiziapp-create-your-own-native-iphone-app/