Customers have been observed attempting to scan their Clubcard app at the till unsuccessfully multiple times
in-store colleagues have reported having to assist customers in scanning by increasing the smartphone brightness
Data tells us 9.2% of customers are interacting with the secondary ‘increased brightness’ screen to scan the QR code
We identified that one of the main issues with scannability was screen brightness (other issues being till hardware). Most smartphone users do not keep their screens at 100% brightness and this can cause problems when the till tries to read the code.
Another friction point I wanted to tackle was the lack of customers scanning their digital Clubcard vs their physical one (33% of Clubcard app customers do not scan their digital card).
With two developers and the Clubcard app product manager we went into store and tested the app at the till to gain understanding of the scannability issue and see if we could resolve it without having to force a certain screen brightness on the customer.
We tested and tweaked 16 iterations of the QR code with variables (changing QR code size, border width and QR code error correction) it was clear that brightness was the culprit as scanning was immediately improved as soon as we increased it to 100%.
Now that we had understood how to solve the scanning issue, the UI of the card was explored both in static and animated form. I wanted the card to feel alive, to feel tactile and plastic like the physical one.
Through prototyping and animation I explored how the card could come to life in the app, bridging the physical and digital world. I played with the idea of the card spinning to reveal the QR code and using the motion also as a way to onboard customers on how to use it at the till.
After exploring and stress testing different versions of an animated card I had to revert to designing a static one. This was due to minimum QR code size, accessibility features and content needed within the card.
The UI solution was a digital card that mimicked the physical one and would remind customers of how they scan their physical card at the till. Upon tapping the card the QR code would be revealed with 100% screen brightness, thus resolving the scanning at the till issue.
Before moving to development the design was tested in-store and remotely with customers to capture their comprehension of the card and outline any usability issues. We found that it lacked affordance and customers were not always reading what it said on the card. Halfway through testing we increased the drop shadow to appear more tappable, and increased the font sizes so the text was legible at arms distance (considering the contextual use at the till). These tweaks solved the usability issues and moved the design into delivery.