I Use a wheelchair, and it can take a bus driver several minutes to unload me from the bus. I have arrival events which I really don’t want to happen until I am close to my front door.
So I switched to using Ibeacons which I have integrated with SmartThings through both the IFTTT Maker channel And an add on to the third-party smartrules app. I have one area set so it only catches me right at the beginning of the wheelchair ramp to my front door.
Unfortunately, Ibeacons don’t work as well with android. There is a brand-new Ibeacons standard from Google called Eddystone. You can find discussion from some people with android exploring it in the following thread