I have several keyboard apps installes. I use them to compliment each other. It is my understanding that I should be able to change keyboards rather swiftly by using the button on the navigation bar to choose a different keyboard among the ones already enabled.
The problem is this only works for a short while after I enable them. Eventually, they end up disabling themselves automatcially, and I have to go into settings, general management, language and input, on-screen keyboard which, and enable them there.
This is a very frustrating process to be doing so frequently.