I'm trying this currently but faced a problem immediately after installing. looks like it does support variant images.
All my products have variants. I got below message.
"578 of them have images linked to variants which will be skipped because it is not supported by SyncIMG. ( View )
62 of them are not initialized on Dropbox."
Still could not find any help and I'm even struggling to find their contact for support.
I'm sorry the app does not fit your need. Currently, SyncIMG does not support products with images for different variants. We have mentioned that in the app description.
In order to contact us for support, you may use the "Get Support" link on our app's page.