Replit + scanner
Browser-based QR scanning in a WebView is slow and permission-hungry. WebViewGold opens the native camera scanner from a link (<code>qrcode://</code> or <code>barcodescanner://</code>) and hands the result straight back to your Replit app: a URL is opened automatically, a barcode value lands in a JavaScript variable.
From $109 one-time per platform, or let our team do it all from $698.
Event entry, class attendance, gym check-ins: the QR code contains a URL of your Replit app with a token, the scanner opens it inside the app, your backend (Express/Flask/FastAPI backends with Replit Postgres or external databases) validates it.
Inventory, product catalogs, price checks: the scanned EAN/UPC value is available as barcodescanresult and can fill a form field or trigger a lookup.
Members show a QR code, staff scan it with the same app. Both sides are plain pages in Replit; the camera part is native.
Paste this into Replit to implement the web-app side. Review the result, publish, then test inside the WebViewGold app.
Add native QR and barcode scanning to this Replit app for the WebViewGold wrapper. In the backend add GET /api/items/:code (lookup in Postgres) and POST /api/scans (code, scanned_by from the Replit Auth session, scanned_at). In the React app add a Scan page, visible only when navigator.userAgent contains my custom WebViewGold token, with Scan QR code (window.location.href = qrcode://) and Scan barcode (window.location.href = barcodescanner://). After the barcode call, poll the global barcodescanresult every 300 ms for up to 60 seconds, then call the lookup, record the scan and show the item. Add a route /i/:code for QR codes. Show a loading state instead of a timeout.
Great work! Never coded anything but managed to work with this. Easy and fast! Also with great help from the creators!
About 10 minutes plus your business logic.
A link or button that navigates to qrcode:// (QR codes, result URL is opened in the app) or barcodescanner:// (barcodes, result stored in barcodescanresult). Show it only inside the app by detecting the WebViewGold user agent.
For QR codes: encode a URL of your Replit app (for example https://app.yourdomain.com/checkin?token=…); the app opens it like any navigation and your page does the rest. For barcodes: read barcodescanresult after the scanner closes and call your lookup in Express/Flask/FastAPI backends with Replit Postgres or external databases.
The WebViewGold projects already contain the camera usage description; adjust the text so it names your use case ("to scan tickets at the entrance"). Both stores read these strings.
With scanningmode://on, off or auto you control whether the scanner closes after the first hit or keeps scanning, useful for inventory counts.
A minimal handler for the barcode variable:
// button inside the app
function startScan() { window.location.href = "barcodescanner://"; }
// WebViewGold injects the result into the page
function onScannerClosed() {
if (typeof barcodescanresult !== "undefined" && barcodescanresult) {
document.querySelector("#sku").value = barcodescanresult;
lookupProduct(barcodescanresult);
}
}Only the camera permission with a purpose string, which the WebViewGold projects already contain. Describe the use case honestly in the string and in the App Privacy / Data safety answers if you store scan data.
Yes, with a JavaScript library. The native scanner is faster and uses the system camera UI; detect the app via the user agent and offer the native scanner there, the web library elsewhere.
The common 1D and 2D formats (EAN, UPC, Code 128, QR and more) through the native platform scanner frameworks.
Same result, different amount of work on your side. All three come with the approval guarantee and 24/7 human support.
$109 per platform, one-time
The WebViewGold license: a finished Xcode or Android Studio project. Paste your URL, set name and icon, switch on features, build and submit. Free updates forever.
See plans on the main page$349 per license, one-time add-on
No Mac, no Xcode, no Android Studio: configure in the browser, we build both apps in the cloud and hand them to App Store Connect and the Play Console.
How the Cloud Builder works Try the free demo$698 per platform $798
Send us your URL and icon. Our team configures, builds and delivers your app within 72 hours, white-label, with source projects. Both platforms for $1,158.
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Rather hand it over? Full Service: we configure, build and deliver within 72 hours, from $698 per platform. Questions? Chat with us 24/7.
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