Quick Response Codes are 2-dimensional barcodes, which can be used for many things. Data are encoded into a graphical format which then can be read by a camera and evaluated using special apps (barcode readers). Example usages include linking to web pages or exchanging contact data. See the 'info' ...

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QR code printer/reader?

I run a small business repairing computers. Sometimes I have very similar looking computers, and shenanigans ensue if the customer labels fall off or the serial numbers I record become detached from ...
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543 views

How to tweak camera/screen for Whatsapp web QR scanner

This is NOT a duplicate of Why I can't scan the WhatsApp QR? or Can't scan QR code for WhatsApp web due to camera inverted or tilted on Galaxy Y Duos. I'm using CyanogenMod 11 (snapshot M12) ...
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QR Scan in WhatsApp doesn't work (QR loads but phone scan never ends)

Not the same as Why I can't scan the WhatsApp QR? because the problem there was the "OK Got It" was not visible due to the screen being too small, but that's not the problem here I have the ...
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Open Source “My QR code” app to quickly share my contact details?

Especially in Japan/Korea, there are many proprietary apps to quickly share your name+email+phone. Example here. They all work the same way: At first use, enter your name, email, phone: It generates ...
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I can't Scan the QR code for whatsapp web

I use an Xperia M2 (that certainly does not have a small screen). I try to scan the QR code from my computer, but it did no work. I tried NeoReader to see if the problem was on my phone and it ...