There is an official app, made by the same devs.

https://apps.apple.com/us/app/ankimobile-flashcards/id373493...

Yup -- https://apps.apple.com/in/app/ankimobile-flashcards/id373493...

It's expensive, but it's the only paid app by the creator of ankiweb (web, android, and desktop versions made by them are all free).

I was hesitant to pay $25 for an iOS app but after doing reviews for 180 days I’m at $0.14 a day and it will only get cheaper… one of the best investments I’ve made for sure

I recommend the iOS app by the original app develop for reviewing but the desktop version for creation.

That’s what I do. Creation is difficult on mobile, easy on desktop and review is easy on mobile but difficult on desktop.