manifest.json

{
  "name": "App Install Banner Sample",
  "short_name": "App Install Banner Sample",
  "icons": [
    {
      "src": "launcher-icon-0-75x.png",
      "sizes": "36x36",
      "type": "image/png"
    },
    {
      "src": "launcher-icon-1x.png",
      "sizes": "48x48",
      "type": "image/png"
    },
    {
      "src": "launcher-icon-1-5x.png",
      "sizes": "72x72",
      "type": "image/png"
    },
    {
      "src": "launcher-icon-2x.png",
      "sizes": "96x96",
      "type": "image/png"
    },
    {
      "src": "launcher-icon-3x.png",
      "sizes": "144x144",
      "type": "image/png"
    },
    {
      "src": "launcher-icon-4x.png",
      "sizes": "192x192",
      "type": "image/png"
    }
  ],
  "prefer_related_applications": true,
  "related_applications": [
    {
      "type": "play",
      "platform": "play",
      "id": "co.qeepsake.qeepsakeApp"
    }
  ],
  "start_url": "./index.html",
  "display": "standalone"
}