This appeal reminded me of HipChat's situation with Messages for Mac, and the similar (but better responded to) action they took [0]. It doesn't look like Bolt did anything to lay claim to the name, and they probably don't want to go up against Facebook's lawyers. Besides, they only support Android at the moment, so to any iOS user, Bolt is completely new (and, likely, same for Android, but at least they had potential to know the product).

0. https://blog.hipchat.com/2012/02/17/they-may-just-be-chat-bu...