this does not meet the first criterion but it might be helpful (?) it is an app on f-droid, it scans and generates:
github.com/SecUSo/privacy-frie…
f-droid.org/packages/com.secus…
#qrcode #qrcodes #qrscanner #qrgenerator
#barcodes #aztec #datamatrix #pdf417 #code128 #fdroid #app
QR Scanner (PFA) | F-Droid - Free and Open Source Android App Repository
(SECUSO) Privacy Friendly QR-Scanner with minimal permissionsf-droid.org
