JRPN 15C

Jovial Software

About this app

Scientific calculator that simulates an HP-15C. It simulates the appearance and behavior of the original, including the seven-segment display, and the little blink you get when entering numbers. Includes complex math, matrices, numerical integration, solving for the root of an equation and statistics. Very state of the art for 1982!

Full source is available on Github.

Ratings and reviews

Is basically OK for a calculator emulation app. Haptic key feedback does not work and many users have reported it. Lame help says to turn on vib feedback in settings, duh. Other third party calculator apps work perfect. Not this one. The author can't seem to figure this out on Android. The author replied with the same answer that he's giving others which I already read and do not work. If there are several other Android calculators that have working tactile feedback, what's the problem with this

Love it! I still have my HP-11c and use it all the time, except when I am not at my desk. I am so familiar with its layout, and so accustomed to thinking in RPN, that I find algebraic calculators confusing and other RPN calculators inferior. So great to have this authentic substitute with me everywhere! A great gift of a free calculator that does not track me. Thank you, devs, for posting your hobby project.

I haven't used it much, but during a quick run through the functionality it seems the f eng, f sci functions don't work. Setting no of dec places does. I will update reviews as I use it more.

What’s new

* Allow choice between Android haptic or vibrate API: Issue 102