If you are outside the Republic of Ireland, you can still log in to the Aertv App but will have restricted access on channels available to stream. 

The Irish broadcast channels, such as RTÉ One, RTÉ Two and TV3 etc. are only available to you outside of the Republic of Ireland.

Fortunately, you will still be able to access lots of great channels through Aertv, even while you are roaming, such as  Aertv Sports, Aertv Movies, Aertv Music and Unravel Travel.