You can build and publish this apps to Google play store or App store without having any programming knowledge, but in order to modify the app you need to have knowledge in web technologies such as javascript, html5 and css3. You also need to be able to install Ionic and its dependencies on your machine.

We recommend you to use the Ionic official installation guide and ask on the Ionic forum for support. We then will be happy to answer all the app related questions/issues via email or Codecanyon comments.