for Android app see https://github.com/lutraconsulting/qgis-quick-demo-app
Experimental!
First follow instruction on https://github.com/lutraconsulting/OSGeo4iOS to build QgsQuick library.
Copy config.pri.default to config.pri and update with your paths to OSGeo4iOS
Open qgsquickios.pro in QT Creator and setup you iOS Kit.
Connect you iPad device
Build on iOS target and deploy
Only memory provider works, it is not possible to use any other provider ATM.