What are the limitations of DEV3 Quarko I should know before buying?

Good to know before you buy

• Drivers are simulated until you configure them. Subscription payments run on a simulated gateway (Stripe, Razorpay and PayPal are present), mail is written to the log until you set SMTP, and scan locations come from a fictional table until you add a GeoLite2 file.
• The safe-link check is guarded off by default. The built-in driver flags a list of test hosts only. To check real destinations you enable the Safe Browsing driver with your own key.
• You are the merchant of record. Quarko handles no money between a workspace and its scanners; your customers pay you, and tax, invoices and refunds are your responsibility.
• PNG uses GD; Imagick is optional. With GD the PNG is anti-aliased. Without GD a pure-PHP writer draws square modules only.
• EPS colour is approximate. CMYK values are converted from RGB; ask your printer for a proof if colour matters.
• The fully round "dots" style reads less reliably in some scanner libraries, such as jsQR, than in a phone camera. The scan check is a guide, not a guarantee: always scan a printed proof with two or three phones.
• Branded domains need your TLS and DNS. Quarko verifies the records but does not issue certificates.
• Web only. There are no mobile apps.
• Name: Quarko is a working name checked by a web search only, not a trademark clearance. Check it before launching under it.
• No hosted demo. The brands, people and places in the screenshots are fictional.