I am planing to write an augmented reality application for android devices. "Vuforia" from QualComm seems to be a good start, but I have some questions their website could not answer. As Android 2.1 and up are supported that would mean a lot of devices could possibly use that SDK.
But - This code only runs on ARMv6 or above. Is there any information about how many devices (in percentage) have which QualComm-Processor?
I'm not sure about the precise percentage but ARMv6 and ARMv7 includes the most popular phones out there. This is a list of ARMv5,6,7 devices which includes most well-known brands.