Reviewers are overwhelmingly negative on QR.io, describing a pattern of unclear pricing, “free” QR codes that later stop working, and pressure to pay after codes have already been printed on cards, flyers, signs, or invitations. A repeated complaint is that QR links route through QR.io, letting the company deactivate them after a short trial or push expensive subscriptions. Several users also report billing problems, difficulty canceling, and poor or missing support. One review says customer service eventually helped, but that is a clear outlier.