Distance between the QR code and the device
It’s important to consider the distance between the QR Code and the user’s smartphone when designing to QR Code. It directly impacts the scan time and responsiveness.
Scanning a QR code takes less than a a few moments and anything more than that would lead to a decrease in the total completed scans.
The Ideal ratio between the size of a QR code and distance of scanning device can vary due to various factors to consider.
For QR codes on mediums that are some distance away, smartphones follow a 10:1 ratio between the distance of the QR code from the device and the size of the QR code (in CM).
As an example, if the distance between the QR code and the device is 100 CM, the smallest size of the QR code must be 10 CM. This can be used as a rule of thumb, although other factors like the lighting have to be taken into consideration when deciding the best location for your QR Campaigns.