Vivino is great to get an idea of the wines, but the prices can be crazy. $50 for a bottle I can regularly get for 10 EUR etc.
Nice app idea. I might just start using it too. How about an iPadOS version to utilize the bigger screen, would that be in the cards?
edit: having flown my first EK A380 J flight just about two weeks ago, I have to agree, the lounge in the back is a special place. Especially if you hit it off with the crew.