[ionic v4][PWA] Angular Service Workers not work on standalone iOS


I am working on PWA withIonic v4 and Angular PWA service workers. On app.component.ts have a injected service to check if updates are available on PWA and then download and reload.

When I open PWA with the browser the service works fine and If I deploy an update the service worker update the cached PWA and ‘auto-reload’ the page.

The problem comes with PWA/standalone mode, on ios when the PWA is added to homescreen it not refreshes anymore even killing it with the task app list. Only If I shutdown the device and on again it refreshes the state of the app. On Android devices all works as expected on PWA mode.

This is my version checker service implemented with Angular service worker:

import {Injectable} from '@angular/core';
import {SwUpdate} from '@angular/service-worker';

export class LogUpdateService {

    constructor(updates: SwUpdate) {
        updates.available.subscribe(event => {
            console.log('current version is', event.current);
            console.log('available version is', event.available);
            updates.activateUpdate().then(() => {
        updates.activated.subscribe(event => {
            console.log('old version was', event.previous);
            console.log('new version is', event.current);

This is my package.json:

"dependencies": {
    "@angular/common": "^7.2.9",
    "@angular/core": "^7.2.9",
    "@angular/forms": "^7.2.9",
    "@angular/http": "^7.2.9",
    "@angular/platform-browser": "^7.2.9",
    "@angular/platform-browser-dynamic": "^7.2.9",
    "@angular/pwa": "0.13.8",
    "@angular/router": "^7.2.9",
    "@angular/service-worker": "7.2.12",
    "@ionic-native/core": "^5.2.0",
    "@ionic-native/network": "^5.2.0",
    "@ionic-native/splash-screen": "^5.2.0",
    "@ionic-native/status-bar": "^5.2.0",
    "@ionic/angular": "4.2.0",
    "@ionic/storage": "^2.2.0",
    "@ngx-translate/core": "^11.0.1",
    "@ngx-translate/http-loader": "^4.0.0",
    "cordova-plugin-network-information": "2.0.1",
    "cordova-sqlite-storage": "3.2.0",
    "core-js": "^2.6.5",
    "ionic2-calendar": "^0.5.2",
    "moment": "^2.24.0",
    "rxjs": "~6.4.0",
    "serve": "^10.1.2",
    "zone.js": "~0.8.29"
  "devDependencies": {
    "@angular-devkit/architect": "0.13.8",
    "@angular-devkit/build-angular": "0.13.8",
    "@angular-devkit/core": "7.3.8",
    "@angular-devkit/schematics": "7.3.8",
    "@angular/cli": "7.3.8",
    "@angular/compiler": "~7.2.9",
    "@angular/compiler-cli": "~7.2.9",
    "@angular/language-service": "~7.2.9",
    "@ionic/angular-toolkit": "1.5.0",
    "@types/jasmine": "~3.3.9",
    "@types/jasminewd2": "~2.0.6",
    "@types/node": "~11.11.3",
    "@ionic/lab": "1.0.24",
    "codelyzer": "~4.5.0",
    "jasmine-core": "~3.3.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.0.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.5",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.4.0",
    "protractor": "~5.4.2",
    "ts-node": "~8.0.3",
    "tslint": "~5.14.0",
    "typescript": "^3.1.6"
  "description": "An Ionic project",
  "cordova": {
    "plugins": {
      "cordova-sqlite-storage": {},
      "cordova-plugin-network-information": {}

Any Idea with this problem?

Have you solved this problem? I think I have the same problem:

PWA support on iOS was not great. Depending on which version of iOS you are testing.

So which verion you guys have?

I’ve just upgraded to 12.4.

I did read something that the ios 13 beta has major pwa improvements.

I did managed to workaround the version change problem on ios. for the time being I just use an interval to call the angular service worker that will check the version