Last month the Circuit overseer was in our area (midwest US) and after he left they made it clear that tablets were not to be used by any of the TMS speakers, or from the platform, unless it were a demonstration on the service meeting. The reason given was that since they are relatively expensive, some might feel pressured to buy one and feel bad if they didn't have one.
But that was before the new Bible and new App release, and I didn't hear the letter this week.
Admittedly, trying to find a Bible verse with the app is a little cumbersome compared to the usual way.