It lacks a Mac/desktop client that I like.I can customize notifications the way I want.Fast and reliable doesn’t crash, doesn’t freeze, opens quickly.Nice for privacy-focused users like me: handy one-touch unsubscribe for bulk mailings, ability to turn off external images, permits using Safari instead of the embedded browser like Google’s apps, which is just a tracking tactic on Google’s part.It lets you respond to invitations from the inbox, and shows whether there are conflicts with no need to look at the calendar itself. Built-in calendar it can replace both Inbox and Google Calendar.Swipe actions to snooze and archive emails.Unified inbox across several email accounts.It’s been updated since I used it last, I think. Simple, clean, light, uncluttered, refreshing. In a nutshell, I think Outlook is the frontrunner for the best email app on iPhone and iOS, but not so on Mac. It’s interesting to revisit it after those years, and I’ve taken some notes to share about that. This isn’t the first time I’ve used Outlook on the iPhone I used it in 2015 until I learned to love Inbox. I used Spark for about four weeks and took pretty detailed notes, then switched to Outlook. It’s the latest in a series of email clients I’m evaluating to replace Inbox, which Google is discontinuing. I’m using Outlook again on my iPhone and iPad.