Nowadays Android devices are mostly equipped with a 64-bit CPU.
64-bit CPU's support not only 64-bit but also 32-bit. This gives
manufacturers the option to installing a 32-bit instead of a 64-bit
operating system on a device with a 64-bit CPU. The difference is
not noticeable but it has a decisive influence on whether
applications with 64-bit native libraries can be executed on the
device. With this little app you can check if operating system and
CPU are 64-bit.
32bit or 64bit / What's New in vUnknown
This version contains some improvements.