Getting negative vibes from the name. Cadmium's a nasty substance. I mean, you wouldn't call an augmented reality app ARsenic, would you? Constructive, I hope, criticism.
I suspect naming it after a substance that's poisonous to humans isn't an issue for most average users, and for the users who are even aware what cadmium is, might just improve memory retention when trying to think of the name again further in the future.
You could add even more punniness to the AR name by calling it ARscenic. I don’t think anyone wouldn’t use the software just because it’s named after a toxic substance.