Love my 15C
Great app! Best emulation of the 15C I have found.
A little overpriced, but to those of us who have grown up with the finest calculator ever made (in my opinion), it is worth it.
An update is overdue that would allow turning off the key click within the app. I know the ringer switch does silence the app, but I find it a nuisance to have to switch it on and off every time I use the calculator. Also would be nice to take advantage of the additional real estate offered by the iPhone 5.
Nick4795 about
HP 15C Calculator