{
 "name": "Online Calculator",
 "short_name": "Calculator",
 "icons": [
  {
   "src": "/android-icon-192x192.png",
   "sizes": "192x192",
   "type": "image/png",
   "density": "4.0"
  }
 ],
 "theme_color": "#0070f3",
 "background_color": "#ffffff",
 "display": "standalone"
}