Ionic allows you to build beautiful native mobile apps for iOS and Android with web technologies. To be precise: Ionic is a suite of good-looking web components and another tool, called "Capacitor" (also by the Ionic team) turns your web app into a native mobile app.
That means, that you now only need a web app - and what better way of building a highly reactive web application than with Vue.js?
That's exactly what's happening in this tutorial (see video at the top).
Note: This video tutorial shows you how to build an Ionic + Vue app from the ground up. Finished source code Learn Vue from the ground up: Vue.js - The Complete Guide (fully updated for the latest version of Vue!)