Minor The Developer App is an app you can install in your iOs or Android device for quick testing in your HTML/CSS changes
It connects to a local (or Internet) server where your application is deployed and applies automatically the changes you've done in the remote files to the local version of the app
It has lot of bugs related to XHR calls (with POST and HEAD) data that we use a lot so the only way to add support to this app is create a "local Moodle site" inside the app that emulates a remote Moodle site. So, basically we are going to "monkey patch" the MoodleWSCall to retrieve local .json files stored in the emulator directory instead doing remote WebService calls using XHR