At the time of writing this review I am currently studying elements of Bond Pricing & Duration. I have a physical HP 12C Platinum that I left back in my room by mistake, so I downloaded this app. So far its just like using the real thing (although admittedly I have not performed any complex computations). My one suggestion would be to update the apps resolution to that of the iPhone 6-7/iPhone 6-7+ native display resolutions.
On my iPhone 7, there are black bars on the left and right hand side of the screen (when held horizontally) that are somewhat irritating.
Surely this fix would not constitute a large undertaking for Hewlett-Packard
4/5
David Lovas about HP 12C Financial Calculator, v2.0.1