One of my idevices has iOS 6. I can't upgrade to the latest version of Pythonista since it is not supported, and many other reasons such as design (I can't, personally, be productive with the iOS 7 design). It would be very convenient if you had 2 applications like Tweetbot (2 and 3), maybe not with the both being developed at the same time, but one closed and one open for devepment. What are you're thoughts on this?

Nah, I'm sticking with the previous version. Even though it has new features I would like to use, I would rather not update because the new design is too painful to bear.