Version 1 of DEVONthink to Go was very much a companion-app only, and extremely limited at that. The current v.2 (been out for a couple of years now) is more powerful and useful. I donât use it stand-alone myself, but I know that there are users on the DEVON forum that report they are successful using it that way. Having said that, if I were to switch to an iOS-only platform, I could probably substitute Readdleâs suite of apps to meet my (also basic) needs.