BuildIt is far from SimCity's mobile debut. An old-school SimCity Mobile was released in 2008, before it was taken down and replaced by the more modern SimCity Deluxe Mobile two years later. History may be repeating itself, because we weren't able to locate Deluxe Mobile on the Apple App Store or Google Play at the time of writing. Google Cache reveals it was available on Canada's App Store on August 31, but the link appears broken now.
We've reached out to EA for more details on SimCity BuildIt and the status of Deluxe Mobile.