Will do. It seems like all the components are there. One of those location clocks had a full walkthrough, including how to hook up the gears. The app for the phone exists, code examples exist, etc. The app includes a free tier of location processing & storage, so it seems like all of the hard stuff has already been done.
I have one more mirror on my plate before I start work on my Weasley Clock. It should be fairly easy to turn that into a module. Should.