QRST Signer
An Android app that moves a Nostr key between your devices by QR code, using QR Secret Transfer.
A QRST pairing code
If the button does nothing, the app isn't installed, or this browser won't hand links to apps. Copy the link and paste it into the app's scan screen ("Paste a pairing link instead").
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Get the app
Releases: github.com/sybenx/qrst-signer. With Obtainium, add that URL to get updates.
Once installed, scanning a QRST code with the phone's camera opens the app directly.