I chose to use ionic for an app for an Android Tablet.
The UI is nice and simple, I like it. But I received the following feedback:
Can we increase the size of everything - The text, buttons, panels etc. Overall, since it is for a tablet, the size of everything needs to be increased, to facilitate better readability. - It looks like the current sizes are optimized for phones.
The color scheme needs to be changed to something much more app specific. To start with, is there a theme chooser (like the http://bootswatch.com/ for instance.)