{
  "name": "Chromatic Tuner — 440 / 432 / Drone",
  "short_name": "Chromatic Tuner",
  "description": "Free online chromatic tuner. Supports 440Hz and 432Hz reference pitch with built-in drone player.",
  "start_url": "/432/",
  "display": "standalone",
  "background_color": "#0a0a0b",
  "theme_color": "#0a0a0b",
  "orientation": "portrait-primary",
  "lang": "ja",
  "icons": [
    { "src": "/432/icon-72x72.png",   "sizes": "72x72",   "type": "image/png" },
    { "src": "/432/icon-96x96.png",   "sizes": "96x96",   "type": "image/png" },
    { "src": "/432/icon-128x128.png", "sizes": "128x128", "type": "image/png" },
    { "src": "/432/icon-144x144.png", "sizes": "144x144", "type": "image/png" },
    { "src": "/432/icon-152x152.png", "sizes": "152x152", "type": "image/png" },
    { "src": "/432/icon-180x180.png", "sizes": "180x180", "type": "image/png" },
    { "src": "/432/icon-192x192.png", "sizes": "192x192", "type": "image/png", "purpose": "any maskable" },
    { "src": "/432/icon-256x256.png", "sizes": "256x256", "type": "image/png" },
    { "src": "/432/icon-384x384.png", "sizes": "384x384", "type": "image/png" },
    { "src": "/432/icon-512x512.png", "sizes": "512x512", "type": "image/png", "purpose": "any maskable" }
  ],
  "screenshots": [
    {
      "src": "/432/ogp.png",
      "sizes": "1200x630",
      "type": "image/png",
      "label": "Chromatic Tuner"
    }
  ]
}