After a couple of dozens Zoho solopreneur products that I transitioned to after becoming a Zoho One enthusiast 5 years ago, I am finally preparing to conquer the remaining two bastions: Mail and WorkDrive (using Google Workspace at the moment). A NYC ZUG meeting last week gave me the final push! 

I'm thrilled to see how both will be weaved into what I've built for my photography studio so far. I'd like to hear from the others: which calendar should I focus on using — the one built into my CRM or the one that is part of Zoho Mail? (Eh, there's a third option, standalone Zoho Calendar...) I know they can reflect the same info. 

If you used them for a long time, what's your favorite? Which is more tightly integrated with other Zoho One products? (As mentioned, I use almost all designed for the small businesses.) Which mobile companion is easier/more robust to use? I like the feel of Mail's calendar but it seems to be missing some of the standalone Calendar app features (which, in turn, has poor UX design, I must say). 

Any experience would be appreciated!