Hey there, my name is Trevor Andersen - I'm a developer for Control4's mobile apps. We're aware of an issue where the iOS app has slower start up times than the android app, but other than that, they should perform similarly. If there's an issue where sessions are starting slowly for you, that's something we'd like to look at and hopefully fix before you have to go out and buy new hardware.
Would you mind giving me some details about what part of it is behaving slowly for you? A video of the problem would be helpful, or if that's not possible, a list of steps you use to reproduce the problem. From personal experience, I haven't had a lot of trouble with the sessions page starting slowly, so I'm wondering if there's something different about the device or driver you're using to start a session - so details about that would help me as well.
Thanks for your help!