On my iPhone, I sync my camera photos with Dropbox, so that after I do a photo shoot all the photos are automatically uploaded to my laptop in the Dropbox 'Camera Uploads' folder - ready to sort, edit and delete as necessary.
I now need to be able to do two-way syncing with the iPhone, so that when I delete (or even modify) a photo on the computer, it's also deleted (or modified) from the iPhone's camera photos folder accordingly; this way I'm not left with dozens of 'dud' photos that I no longer want on my iPhone, despite having already deleting them on the laptop.
The official Dropbox mobile client doesn't allow two-way syncing, so until they introduce such a feature, this can only be possible via a third-party dropbox API-using client.
On Android, I could do this with Dropsync, with many features and full sync customization. Is there an equivalent Dropbox solution for this on iOS?
(I am aware of the idea that iCloud may do two-way syncing built-in, (though am not sure), but I'd like to be able to share the Camera Uploads folder with family members on Windows computers (and even linux), and so find Dropbox a much more multi-platform-friendly service to use for the syncing and collaborating, instead of the iCloud ecosystem.)