While I use Imaging Edge and agree with you about it's quirks. For straight shutter release, the PocketWizard - and perhaps some on the far cheaper flash controller knockoffs - will work, but you are shooting blind. My primary remote use is pole photography, and the ability to see and control wirelessly on phone or tablet is critical when the camera is 20 feet above my head. Prior to Sony, I used Nikon with Camranger and that blows Imaging Edge out the water, but Camranger was not compatible wit
Problem solved (mine). I had to delete all references to the camera and the addresses of the wi-fi connection (or whatever is called) in my cell-phone (on the one recently updated to android 10, not android 9), and then allow the phone and Imaging Edge to recognize it again from zero. Now it works (differently though).
In the phone where I have Android 6, to establish the connection, I only need to set the camera to connect and to initiate the connection directly from and in Imaging Edge. I
Checked. In my case, the problem seems to be due to Android 9. I tried and tried and couldn’t establish the connection.
I have an old cell-phone which I keep because I use its GPS functions (I sail).
It has Andorid 6. I downloaded and have just installed Imaging Edge Mobile in that phone and it works fine, as it should. And I can see the object to be photographed both on the cell-phone and on the camera’s screen, and I can trigger the shutter (and the photo is sent to phone).