@RosemaryOrchard mentioned she uses iBeacons to determine when she is in a particular location vertically (home and work being in multistory buildings).
Would love to hear from people using this technology that I had forgotten about (preferably in a non-evil way, such as Rose’s use, and not so much “we know you walked by the winter coats at Macy’s, so here’s an ad for you on Facebook” kind of way).