Apple has noted that a number of users may experience an issue with iCloud setting being enabled after upgrading to iOS 10.3. For me, I had quite the opposite experience, as iOS 10.3 finally enabled some iCloud applications that I had never gotten working for a long time!
Apple acquired Workflow today, and Workflow is now free in the App Store! Workflow (http://workflow.is)is a powerful yet simple rule-based automation tool. One pre-built workflow is to lookup your next calendar meeting, retrieve the location if there is one, and pop up directions in Maps - all this from a single button click.
If you are new to Workflow, here is a short tutorial to use Workflow to track travel expenses.