Guild Chat App
Firstly, it has been brought up before, infact there is a topic about it on the 5th page although it only has 3 replies. However, the way I see it is, the idea is nice and yeah one day should be made, but at the moment there are enough bugs and problems with the feature in the game let alone making a app without any. If anet make an improvment on it ingame maybe they can start thinking about making stuff like app’s.
As for not being able to play can’t you just send a message out of game to someone through forums or any other method?
I could, but sadly I don’t remember peoples display names (_.1234). That could even be a feature added to the forums, to show your guild or each guild to have a page. So many things can be done and hopefully will be at some point. But yes there are still issues with the current guild system in game, hopefully once they tweak things they can make an app.