To the best of my understanding, if I am overnighting in Doha (leaving the airport), as an Australian passport holder, I can get a visa on arrival. The Etheraz website where you get pre-approval is asking for a visa number. Does anyone know if this is compulsory?

i am applying for my partner and I under one application.

I will also download the Etheraz app. If I have one Etheraz application submitted, does one App. work, or do we both need our own app on our own phones?

Our stay is from 11.25 pm to 2.30 pm the next day.