I have a physical key, so I don't need an app, but I also have WP8, and realise that companies shaft it regularly... It is the number three OS on the market, and is actually really damn good. I understand why large-scale development is often held back for WP8 due to risk versus reward, but for small things like this that will require virtually no investment, and provide a service to people who regularly plug their cash into the system, there really isn't an excuse to not develop. It's just penny pinching. (I'm also looking at you, multi-national banking conglomerate with my money in its vaults, and no WP app).