I use Outlook. I have an account (e-mail address removed) which is synchronised with:
Outlook on Windows 10 on my desktop machine (Outlook 2013)
Outlook on Windows 10 on my laptop (Outlook 2016)
Outlook for Android on a pad.
I can also log in on any other computer to (e-mail address removed)
I have to do nothing to keep them synch'd, it just happens... if I delete an email on one, it disappears from the others. In other words, I see the same wherever I connect. This includes email, calendar, contacts.
It doesn't have connections to weather or other irrelevant applications, it is clearly designed to be as attractive to business as to personal users.
I believe the user interface to have all developed from MS Outlook (as was) and the infrastructure developed from Hotmail.
I tried GMail, but had too many problems of not receiving important mail due to GMail handling any multi-address emails as spam and refusing to even let me decide for myself. At least Outlook puts anything it thinks is suspicious into Junk folder. Any phishing I have received has invariably ended in Junk and the links disabled. From time to time I get a genuine email put into Junk, but that is for me to decide on whether to actually delete, not Outlook. GMail did not give that option. I continue to get emails I send refused by GMail to some of my circulation list, so it hasn't got any better.