Does not work at all, the reported count is the same with background radiation only, and with gamma and beta sources nearby.
Nice idea but significant bug Worked at first but after a minute or so, a line of pixels started lighting up spuriously and gave a false reading. Checked the conventional camera with the lens taped over and I did not see this effect.
New in version 1.1
cover lenses message more clearly displayed
Galaxy TAB 7, display corrected
some spelling errors corrected