There are basically two types of mobile apps. Those that need access to the phones resources e.g. file system, camera, contact list etc.
and those that don't.
Those that do not require access to the phones resources can be coded as
responsive web applications; for this we use
Angular which is an open-source framework led by Google.
If you need to access the phones resources or if you really want the native look of the phone we couple NativeScript with Angular to achieve this.
We are highly experienced in developing automated systems for deploying releases and updates to the Apple App Store and the Android Play Store.