Editorial v. 1.1.1, OS version: 8.1.3, phone model: MD638LL/A.
I'm sure you are aware of this but iOS's built-in Dictation's three purple dot animation hangs on the screen for me after using it once. After multiple uses often the dictation button stops working -- upon press it simply goes from light gray to dark grey and stays on dark gray. If the purple dot animation has been hanging for awhile during multiple dictations the app will inevitably crash. Also, sometimes a dictation won't commit properly and only a series of spaces will output upon completion.