Have you heard of Hybrid Mobile Development? I was wondering if you could do tutorials on Cordova and Ionic Mobile Development. Native Apps uses specific APIs, where Cordova and Ionic are Frameworks to work across all devices.
Apache Cordova takes care of packaging your HTML5 app as a native app that can run in Android, iOS, and other platforms. I'm not familiar with Ionic Framework, but I believe the technologies used in Ionic are Cordova, the open sourced component of the PhoneGap platform, Sass and AngularJS.
It allows you to create cross-platform applications, meaning you can write your code once and deploy it anywhere; iOS and Windows.