The QR code encodes a special link. When someone scans it, our server checks their phone's browser information and instantly redirects iPhone users to the App Store link and Android users to the Google Play link you provided.

For app-link QR codes, desktop and other devices are sent to the Android link by default, since Play Store pages are viewable in any browser.

Yes -- switch to the "Website URL" or "Plain Text" mode above. These generate a QR code directly from what you type, without needing the smart device-detection used for app links.

No -- it stays active indefinitely, as long as the links or content it points to remain valid.

Yes, generating QR codes on EdTecInfo is completely free, with no account required.