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Don't use qr.io, deceptive advertising, the QR code becomes disabled after 7 days. The company engages in misleading advertising, claiming to offer free QR code generation, but does not make it clear that this only applies to the 7-day trial period. After 7 days, you need to pay US$35.00 (almost 200 reais). Since the generated QR code was for institutional material and would be used throughout the year, I had to continue paying. Even so, the company is acting in bad faith. I made the payment on April 2nd for 30 days of use, but on April 17th the link/QR code was already blocked. If the package is valid for 30 days, the link should remain active for 30 days, not 15. I sent emails and answered the questionnaire on the website, but received no response. Besides engaging in deceptive advertising, the company doesn't even respect the 30-day period for the amount I was forced to pay. Don't fall for this company's scam.