It definitely looks nicer than Anki. It's also better for creating simple cards, something which I haven't really been able to do on the Anki app. The workflow for adding a new card is a great experience. I do think that creating my own cards is an important part of the memorisation process. I've downloaded pre-made cards before, but the stuff I use in conversation is almost always the stuff where I've created the card. Those are the words/phrases that leap to mind.
One issue - my recorded audio didn't play when I reviewed the card (either on the front side or the back side). Maybe a bug?
Based on just 5 minutes of experimentation, I expect that this will become my "on the go" card creator, while I'll keep Anki around for the time being because, when I create cards on my laptop, I can import Forvo pronunciations etc.
Have you thought about how to monetise this?