Sorry, we don't target old iOS versions, the oldest version we test it on - iOS 7.
Usually new iOS version adoption is very fast and most of the devices has latest and previous version installed.
Here is some stats:
http://david-smith.org/iosversionstats/
Usually new iOS version adoption is very fast and most of the devices has latest and previous version installed.
Here is some stats:
http://david-smith.org/iosversionstats/