Startup Idea: UI Control Suite and Xamarin Build Speed Optimizer
Well this is an interesting HIT. I work in the software industry. The company i work for works in incident reporting and Computer Aided Dispatch (like for cops/security).
So i dont know what you'll do it specifically help this. We work with web applications, mobile applications, and windows/desktop applications.
There is always a need (in my opinion) to have a good UI control suite. Especially on the mobile end this would be nice, and a huge plus if it was Xamarin and Xamarin.Forms (these are mobile app frameworks) compatible. It's not that this problem hasn't been solved, but it hasn't necessarily been solved well. There are only a few key players in the market (that i can think of). One of the big ones that comes to mind is Telerik/Progress but often times their stuff is not fun to work with.
Otherwise it's hard to think of a pain point that is solvable.
One example of a pain point when working with Xamarin is (again, UI controls) working with Windows and Mac at the same time. Especially when the builds take a ridiculously long time sometimes. Find a way to speed up Xamarin builds and i will pay lots of money :).