New Acron RPN Calculator for Android

[vanLudwig]

I just made my Acron RPN Calculator available in the Google Play store, and I'd love to get some constructive feedback from RPN enthusiasts. The full version isn't normally free, but I'd be willing to give a promo code for a free full version to the first handful of people who ask. There is also a free version in the Play store named Acron RPN Calculator FREE with a subset of functionality.

This is not just an attempt to get a plug for my product. I am genuinely interested in some feedback. I'm the only person I know who likes RPN.