Excellent!

Have depended on my two HP 12c calcs for years and dreaded having to carry both a cell phone and the HP back and forth. This app takes care of that and does it very well. It even has its own user guide, helping eliminate the big HP guide, but of course HP explains all the possible programming on the Magic Black Box. Sound is easy to turn down: just use the down/up buttons! As for the light keeping wifey awake, get outta bed! The only drawback is the small size, but that is limited by the size of the iPhone, not any problem of the app.

RachmimV about Vicinno Financial Calculator, v2.530