I love Inbox and I'm dreading Google shutting it down. I've tried several others in the past but haven't found anything else I like as much. At this point I suspect I'll just go back to gmail and be less happy but I'm hoping there is an alternative I could like as much.<p>Tell me what you use for email and why it's awesome.<p>only requirements are works on iOS and Mac. Doesn't need desktop app, web is fine (perhaps even preferable).