Acompli released an Outlook like app last year and Microsoft did not waste much of a time in snapping up this company. The result, Microsoft official Outlook for iOS app and in quick time.
Microsoft launched Office for iOS and Android sometime last year. The lack of Outlook as an app was one of the issue that the company face and turns out, with Acompli, they managed to fill that annoying gap.
After installing the app, it just feels like I'm using the Acompli app. For now it feels that Microsoft has just rebranded this app to Outlook, made a few updates and launched it. Most of the updates are integrations with Microsoft's own offerings (OneDrive is now available as an integration). Hopefully Microsoft continues to support Dropbox and Google Drive or other external cloud storage services in the future.
Microsoft's general manage of Office, told the Verge, "We have been and we'll continue to update the app weekly".
Some time back I wrote about the Acompli app while I was on the look out for a decent Calendar app. My feedback still stands the same for the Microsoft Outlook app, however after the rebranding, my perspective for the app changed. I'm looking at this app more from an email client perspective and less from a calendar app perspective. And so far as an email client, it does a great job and at the moment I can comfortably say its one of the best email clients for the iOS - yup, time to replace that slow and weird Gmail app on your phones.
I still continue to use Mailbox simply because I use this app on all my drives - iPhone, iPad, MacBook. With Microsoft Outlook available for all these platform as well, I'm still not sure about their Desktop app. I'm keeping my options open.
With the launch of Microsoft Outlook, Microsoft has been pushing its Office productivity software to iOS. There is a "preview" version for Android available for now and this only confirms that "iOS first" still holds true.