Ole Zorn released the all-new Pythonista 3 this morning. This app replaces Pythonista, and supports both Python 2.7 and 3.5. It includes a "2 to 3" tool to automagically update your scripts. All my Scripts are written for Python 2.7, so this seems right up my alley. I'm also a little paranoid about handing over my code to robots to fix.
Regular price for Pythonista 3 is $10, but it's on sale for $5 right now. If you do any nerdy stuff on your iPhone or iPad, you really should buy Pythonista 3. This site wouldn't exist without Pythonista, and I barely even scratch the surface of the app's capabilities.