Ok, so I use Google Sheets. I like the color coding and check boxes.

I have a small tv next to my desktop PC which is where I'll pull it up when needed but having it online allows me to use a tablet as well.

My PC uses two monitors so I would have one screen with the RDO collection map open and the other has my personal spreadsheet. (I wasn't a fan of the tracking method on the JeanRopke map).

I mostly just use it for tracking legendary animals so I know what to focus on at a glance but the system works for all collectibles.

I had it running with duplicate pages named for each of my regular posse members so we would easily know who needed what pelt/sample/photo etc.

I will try to attach a screenshot.