To use config.xml version number on APP. you need install APP VERSION with npm.
To display the version number on APP.
this.platform.ready().then(() => {
this.appVersion.getVersionNumber().then((value) => {
var value = value.replace(/"/g, '');
this.version = 'v'+value;
})
});
and then put {{version}} where you want to display in html page.and the output will be like this v1.0.1