QR Sidekick now has a monthly plan at just $1.25/month to do just about all the scanning you could possibly need. This gives you the option to scan with any break for adds and other interruptions, just scan scan scan.
QR sidekick is the only app that scans directly into Google Sheets with no import/export. All scans are instantly live in your sheets and all the formulas update. You are not required to set up an account or hand over weird permissions.