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Description
As per B36: please UNINSTALL the existing app before installing B36 or higher. I had to change the app ID which means if you upgrade it won't overwrite but you'll end up with TWO calculators.
This is a scientific RPN calculator, inspired by (but not exactly emulating) the famous HP 1xC range of calculators. It features a 4-level stack and tons of calculator features.
This application INCLUDES a full blown unit converter supporting 20 different properties and an enormous amount of different units to convert from and to within these properties.
There is keyboard support for number entry and basic operations.
This application has a fully customized GUI and a lot of work has been put into making it look as pretty as possible. If you're not familiar with RPN calculators, here's some simple examples:
This application has a fully customized GUI and a lot of work has been put into making it look as pretty as possible. If you're not familiar with RPN calculators, here's some simple examples:
Let's say you want to add 5+3:
On a normal calculator you'd type '5 + 3 = '.
On an RPN calculator you type '5 ENTER 3 +'.
It's kind of like using paper to do calculations if you think of it.
RPN really shines when it comes to more complex calculations where operator precedence comes into play and brackets would need to be used. This is because an RPN calculator has a 4 level 'stack'.
Let's say you want to do the following:
((5 * 3) / 2) + 7
On a normal calculator you'd need to use brackets.
On this calculator you simply type:
'5 ENTER 3 *', then '2 /' and finally '7 +'. Pretty cool huh?
This application is still under development which means there will be bugs. Feedback is more than welcome!
This application is now only available as source on GitHub and will be in the app store soon for $9.99. You're free to get the source from GitHub and build it yourself but you're NOT allowed to (re)distribute IPK packages of this application.
More Screenshots
License
Other (Described above)
More about the license
Availability
In beta now. Will be open source (have to build app yourself from source) and available for a fee in the app store. Read the license!
Download Options
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Discussion, Changelog, and Support
Discuss this app, get support, and read the changelog for Scientific RPN Calculator in the
Official Forum thread
Comments
Thank you for this - I really wanted an RPN calc on my pre (So hard to use a regular calc once you use an RPN - been using one since college way back in the day). All in all works great and I love it.
A landscape option would rock!
Thanks for a great app!
EK
It would be cool if there would be graphing.
I've always been a fan of RPN thanks for the great calculator. However, your example for the order of operations is not a good example:
((5*3)/2)+7 can be done without any brackets either on basic calculators or scientific calculators because 5*3/2+7 doesn't need brackets.
A better example would be 20/(2*5) where 20/2*5 is not the same.
20 ENTER 2 ENTER 5 ENTER * / for 20/(2*5) and
20 ENTER 2 / 5 ENTER * for 20/2*5.
This application is quite good. I really like the haptic feedback. One feature I don't see that I would like to have is a way to view the stack. I miss that from my HP 48. But this is great. Keep up the good work.
The haptic feedback is much improved! It's really connected to hitting the keys now; lagged a bit in earlier versions.
Just started playing with the conversion facility. I think the interface is a nice compromise between speed (1-button access to your favorite/current conversion) and completeness (a nice wide selection of properties and units - as a chemist, nice to see viscosity, energy and force in there).
Love the app! When can we expect to see the trig functions operative?
jalee, which trig functions do you mean? I have sin, cos, tan, arcsin, arccos, arctan and their HYP versions working just fine right now! :)
My mistake. I had quickly run a small equation that I use often and could not obtain a reasonable answer. Reading your reply, I put on my glasses, realizing that it was set to radians. This is a great app!
awesome, I cant tell you who many times I have forgotten my calc in class and needed a decent work around. this app is a life saver.
Good stuff.
awesome! I hope this wins the preDevCamp contest! I saw your video too!
Very nice app! I have a little suggestion though, the bottom buttons are cut off when the phone is charging or connected to the computer, very very tiny bug though, just wanted to point that out.
I like it and may use the linear algebra features in the near future. I tried turning off the haptic feedback, the program seemed to ignore the setting.
On latest release, most of the help is not in English. Would be nice to have a programing functions so the user could write a program for the calculator.
The text you see in Help in the current release (B34 at the moment of writing this reply) isn't help text. It's latin placeholder text designers use to see what something looks like with text in it. see http://lipsum.com/ for an explanation.
The Help section is still to be written but I won't start it until functionality is fully finalized. I'm almost there though!
This is one of the best calculators I've used. I don't even reach for my HP 32S anymore. The tiny stack view at the top is a huge usability improvement over actual single-line RPN calcs.
It's unfortunate that recent versions lack the haptic feedback, but I know that's not the author's fault, but Palm's.
good job, love having it on my pre. it comes real handy
My HP-41Cx gave up the ghost earlier his year, glad to have another RPN calculator. Been using RPN since the HP-45. Still have the HP-45, HP-29C, HP-41Cx, HP-16 and HP-200LX.
Really super! The HP-28s calculator provides the factorial function that is really the gamma function (of x+1). See http://www.rskey.org/detail.asp?manufacturer=Hewlett-Packard&model=HP-28S It would be really excellent to have this implementation. Nice work!
0.1 x 0.1 results in 0.01
0.1 to the power 2 results in 0.100000000000002
Ops!
It would be nice if the developer could create a business calculator based on the popular HP 12C.
Needs a bigger stack. I am used to one with a 40 level stack.
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