Which European countries are already using the EES pre-registration app?

The EU's border agency Frontex developed an app allowing travellers to pre-register for its Entry/Exit System rollout. With the summer travel season upon us and queues expected at tourist hotspots, what happened to the app and which countries are using it?

This story was reported by The Local Germany. EUROPES curates Europe's most relevant coverage — read the full report at the original source.