A question about Rivo, texting, and tactile cases for IPhone.

So I have a question about the Rivo keypad as well as a suggestion if you can't already do this. So as far as I understand when typing with the Rivo for text messages, one of the imput methods acts like the old way of texting on a normal phone with a keypad. All letters are assigned to numbers like ABC to the 2 key, D E F to three, etc.
Now as you have to single, double or tripple tap the key you want for the letter as you know this is a bit slow. So on the old phones they had T9 predictive text. This made it extremely fast to text especially for us and once it learned what words you used it was excellent.
Now since the Rivo can take input this way is their anyway that it can either be set up to use T9? Or is their a way that it can interface with an IPhone application?
Their is an app that is called T9 predective keyboard that allows you to type on the IPhone screen just as if you were using a keypad. So was thinking if Rivo could interface with this application then you would be able to use T9 for typing on it instead of single, double or tripple tapping numbers.
Now another option I was thinking about if this can't be done with Rivo is getting one of the Braille dots cases that have the keypad layout assigned. Then I could just use that app with the tactile keypad layout. But I just ordered the keyboard version of the case. So are they changeable between each other perhaps?
Just trying to think of all the different ways I can have my phisical typing experience back. They don't make bluetooth keyboard cases any more so that idea is out. Anyway ideas here?
I think I will like the keyboard layout on the braille case but would really like to give the keypad layout a try and text with the T9 application to see if I can text with one hand.