I recently got the AnkiMobile app for iOS for Mandarin. It was buggy and feature-lacking in my opinion, so I made a nice looking Anki-compatible alternative app, with more features.

It uses a tuned FSRS5 algorithm and supports image occlusion out of the box. You can import your existing Anki decks into it or create a new one. Pretty quick to add cards with the image feature.

I'm using it right now and will add more to it so let me know what you think.

FYI, it has a one-off purchase of $14.99 to unlock it for lifetime (no taksies backsies) after a test period of seven days.