There seem to be, at present, none that are iOS compatible, so this was the best option that I could find. It’s took a while to find an Android device from the pile and get it working. (I had to buy a special USB OTG cable to connect my Yubikey for 2FA, really silly!) but its up and working, and friends, the world in UV is weird:
Things to note: My glasses reflecting and blocking UV (just like it says on the tin), skin damage seems more visible, and my light grey car looks almost black. The sky is grey and my daily face sunblock seems pretty good.
So far, it’s money well spent – I’ve already used it as quality control on the kids’ application of sunblock. It’s a good investment if you live someplace as sunny as this.