Largest app store by an order of magnitude (i seldom pay for anything, tons of free stuff available that do what I want)
Just to be a bit pedantic, "order of magnitude" is false. Android's Market has about 66000 applications, Apple's App Store has something just over 200000. So about three times larger. Three times is not an order of magnitude.
I cannot conceive that anybody will require multiplications at the rate of 40,000 or even 4,000 per hour ... -- F. H. Wales (1936)