Cardjar

Coverage · United Kingdom

80 British loyalty cards, recognised on sight.

Scan any of these and CardJar knows what it is: the scheme's name, its colour, and what the number on the back is called. The list is compiled into the app, so nothing is fetched and nothing is logged.

Every British scheme in the catalogue

Colours come from each retailer's own published brand guidance, and every one is checked to keep text readable against it. Names and colours are used to identify a card you already hold; CardJar has no relationship with any of these retailers.

Carrying a card that is not on this list?

Add it anyway. Type a name, pick a colour, scan the barcode, and it behaves exactly like the ones CardJar recognises. The catalogue saves you thirty seconds; it never decides what you are allowed to keep.

Tell us what is missing and it can ship in the next release.

Ready before the person in front of you has packed

Open, tap, hold it out. The till screen turns the brightness up on its own, draws the barcode at whole pixels so a laser has a clean edge to find, and stays white in dark mode because a tinted barcode is a barcode that does not scan.

Not on Google Play yet

Email me when it landsRead what it never collects

CardJar is built and tested and is going through the last checks before the Play listing opens: Android and Wear OS first, iPhone and Apple Watch after. One message, when there is something to install, and nothing else ever.

The CardJar till screen showing a Tesco Clubcard EAN-13 barcode on a white plate with the number underneath