1:1 is for Insta and 16:9 for… i don’t know. But 3:2 is the standard SLR ratio and must be a saved default option in any serious camera app especially trying to emulate SLR with a grip with half-press options etc.
If an app does not honor 3:2 I won’t be using it. And Fjorden missing it I won’t be considering ordering the grip at this time and which I otherwise would be looking for. I have no interest in “extra pixels” which I would miss if first shooting in 4:3 but excluding those pixels anyway if forced to do extra work by cropping after shooting like right now.
The other no go is the limited portrait mode.
Just include 3:2 as a default to start with.