Installing web apps on phones (for real) https://joreteg.com/blog/installing-web-apps-for-real

Progressive web app (PWA) using Ionic 3: https://nagcode.wordpress.com/2017/04/29/progressive-web-app-pwa-using-ionic-3/

How I built a PWA with Angular and Firebase Part 1: Introduction https://codewithstyle.info/how-i-built-a-progressive-web-app-with-angular-and-firebase-part-1/

ionic deploying pwa https://forum.ionicframework.com/t/deploying-pwa/73749/4

Launching a Progressive Web App (PWA) with Ionic https://www.joshmorony.com/launching-a-progressive-web-app-pwa-with-ionic/

Uploading a Production PWA with Ionic https://www.joshmorony.com/uploading-a-production-pwa-with-ionic/