I stick to F-droid android app store. it asks developer to submit their code which gets compiled by the F-Droid team. apps with proprietary codes are flagged. few QR code apps from F-Droid. https://f-droid.org/en/packages/com.example.barcodescanner/ https://f-droid.org/en/packages/com.secuso.privacyFriendlyCo...
Same here. The first one is also installable from Google Play with a different package name however : https://play.google.com/store/apps/details?id=org.barcodesca... It also uses the ZXing library. It does not contain any tracking or ad SDK's per the exodus report : https://reports.exodus-privacy.eu.org/en/reports/org.barcode...
https://play.google.com/store/apps/details?id=com.secuso.pri...