Fjorden Camera App - UI Customization

When you get around to Android, I'll get around to purchasing. I'm excited, but after reading your FAQ, I'm holding back on my excitement level.

I really love the design of your camera grip and would love to pre-order but I cannot if the app has not been released. Having the app released and with good reviews, will make me comfortable and trust that your grip will actually be sold.
When should we expect the app in the US app store?

Also, do I need the adapter if I dont want to use a case but I have the iPhone 13? Is the grip magnetic to the iPhone, or only the adapter?

Is the Fjorden grip compatible with the iPhone 13 mini?