Registrywww.duolingo.com

Duolingo

ACTIVEPASS WITH WARNINGSwww.duolingo.com

Validation and status

Status	ACTIVE
Result	PASS WITH WARNINGS
Last checked	2026-09-03T00:56:12.300Z
Last changed	2026-09-03T00:56:12.300Z
First seen	2026-09-03T00:56:12.300Z
Record	/registry/v1/apps/www.duolingo.com.json

Normalized record

Deterministic interpretation of published standards. The source column is the original discovered field. Nothing here is invented. Field list: Registry Record.

Field	Value	Discovered from
Name	Duolingo	manifest.name
Short name	Duolingo	manifest.short_name
Description	Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps!	meta.description
Start URL	https://www.duolingo.com/?utm_source=pwa_launch	manifest.start_url
Scope	https://www.duolingo.com/	manifest.scope
Display	standalone	manifest.display
Manifest	https://www.duolingo.com/manifest.json	link[rel=manifest]
Theme color	—	manifest.theme_color
Categories	—	manifest.categories
Service worker	Not detected	script evidence

Capabilities

Observed from published standards. Absence is not a platform guess.

Flag	Observed
Narrow screenshots	false
Wide screenshots	false
Maskable icon	false
Monochrome icon	false
Service worker detected	false
Share target declared	false
File handlers declared	false
Protocol handlers declared	false
Shortcuts declared	false
Standalone display	true
Fullscreen display	false
Orientation declared	false

Normalized JSON

{
  "capabilities": {
    "narrowScreenshots": false,
    "wideScreenshots": false,
    "maskableIcon": false,
    "monochromeIcon": false,
    "serviceWorker": false,
    "shareTarget": false,
    "fileHandlers": false,
    "protocolHandlers": false,
    "shortcuts": false,
    "standaloneDisplay": true,
    "fullscreenDisplay": false,
    "orientation": false
  },
  "application": {
    "id": null,
    "dir": null,
    "lang": null,
    "name": "Duolingo",
    "icons": {
      "primary": {
        "src": "https://d35aaqx5ub95lt.cloudfront.net/images/pwa-icon-circle-512.png",
        "type": "image/png",
        "label": null,
        "sizes": "512x512",
        "width": 512,
        "height": 512,
        "purpose": null,
        "platform": null,
        "reachable": true,
        "validImage": true
      },
      "any": [
        {
          "src": "https://d35aaqx5ub95lt.cloudfront.net/images/pwa-icon-circle-512.png",
          "type": "image/png",
          "label": null,
          "sizes": "512x512",
          "width": 512,
          "height": 512,
          "purpose": null,
          "platform": null,
          "reachable": true,
          "validImage": true
        },
        {
          "src": "https://d35aaqx5ub95lt.cloudfront.net/images/pwa-icon-circle-192.png",
          "type": "image/png",
          "label": null,
          "sizes": "192x192",
          "width": 192,
          "height": 192,
          "purpose": null,
          "platform": null,
          "reachable": true,
          "validImage": true
        }
      ],
      "maskable": [],
      "monochrome": [],
      "all": [
        {
          "src": "https://d35aaqx5ub95lt.cloudfront.net/images/pwa-icon-circle-512.png",
          "type": "image/png",
          "label": null,
          "sizes": "512x512",
          "width": 512,
          "height": 512,
          "purpose": null,
          "platform": null,
          "reachable": true,
          "validImage": true
        },
        {
          "src": "https://d35aaqx5ub95lt.cloudfront.net/images/pwa-icon-circle-192.png",
          "type": "image/png",
          "label": null,
          "sizes": "192x192",
          "width": 192,
          "height": 192,
          "purpose": null,
          "platform": null,
          "reachable": true,
          "validImage": true
        }
      ]
    },
    "scope": "https://www.duolingo.com/",
    "display": "standalone",
    "sources": {
      "name": "manifest.name",
      "shortName": "manifest.short_name",
      "description": "meta.description"
    },
    "startUrl": "https://www.duolingo.com/?utm_source=pwa_launch",
    "shortName": "Duolingo",
    "shortcuts": [],
    "categories": [],
    "themeColor": null,
    "description": "Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps!",
    "orientation": null,
    "screenshots": {
      "narrow": [],
      "wide": [],
      "unspecified": [],
      "platformSpecific": []
    },
    "shareTarget": null,
    "capabilities": {
      "narrowScreenshots": false,
      "wideScreenshots": false,
      "maskableIcon": false,
      "monochromeIcon": false,
      "serviceWorker": false,
      "shareTarget": false,
      "fileHandlers": false,
      "protocolHandlers": false,
      "shortcuts": false,
      "standaloneDisplay": true,
      "fullscreenDisplay": false,
      "orientation": false
    },
    "fileHandlers": [],
    "iarcRatingId": null,
    "launchHandler": null,
    "serviceWorker": {
      "detected": false,
      "scriptUrl": null
    },
    "backgroundColor": "#ffffff",
    "displayOverride": [],
    "protocolHandlers": [],
    "relatedApplications": [],
    "preferRelatedApplications": null
  }
}