Screen Recording on iPhone?

[Kritzmire]

I'd like to find a good app for screen recording on iphone, and all I've managed to find is "Screen Recorder," however it has awful frame rate/lag.
Is there an iPhone app that can record screen with great frame rate?
I'm open to recording on my computer as well.
I have ScreenFlow and I was trying iDemo but it was pretty choppy as well.

Any suggestions?

[Gerneio]

Display recorder