On your computer in Finder and File Explorer, on your phone with the app.
Built into Finder: see the status of every file and download it only when you open it.
Built into File Explorer: see the status of every file and download it only when you open it.
The Flow app for Android, iPhone and iPad: files, chat and calendar away from the office too.
Nothing to install: sign in from any computer, with the same files and the same permissions.
The apps need a Flow account. See the plans