Two small Android tools in one app: a one-tap lock-screen QR code, and opt-in background GPS sharing to your own dashboard.
Build a contact QR code and set it directly as your lock screen wallpaper — handy if a lost phone needs a way back to you, or as a fast "add me" card.
Start it once from inside the app and it keeps running in the background, sending this phone's GPS position to your own dashboard every minute or so. Android requires a permanent notification the whole time it's active — this is by design, not hidden.
Nothing is sent anywhere until a pairing code links the phone to a dashboard — see setup below.
This is a debug build, not signed for the Play Store, so Android will ask you to allow installs from this source the first time. Minimum Android version: 8.0 (API 26).