XF 1.2 Show notice only to Tapatalk users

Is it possible to show a notice only to Tapatalk users?

I've removed the annoying pop down that tells mobile users there is a Tapatalk app available. Now I would like to show a notice to Tapatalk users to say that the forum works perfectly well without an app and it is even possible to upload photos.

Can't figure out how to do it without showing the notice to everyone. Any ideas?