RPN 30 4+
An awesome RPN calculator!
Ashok Khanna
Designed for iPad
-
- Free
Screenshots
Description
Reverse Polish Notation ("RPN") is an alternative way to complete calculations. Many find it to be more intuitive and user-friendly than the "normal" way of using a calculator. RPN works entering numbers first and then the operator (i.e. 53 47 + will give you 53 + 47 = 100).
This is my artistic interpretation of the ideal form for a calculator, taking inspiration from the standard Apple iPhone calculator. Make sure to spend a few minutes to get the hang of the calculator and also read the short help guide (accessed by a long press on the help button) to get the most out of it.
No ads, no paid features, always free to use.
Please enjoy and leave a review if you like the calculator.
What’s New
Version 2.40
Added functions for converting from polar coordinates (in degrees) to rectangular and vice versa.
Ratings and Reviews
Absolute gem!
I was just introduced to RPN, but unfortunately I couldn’t find any modern calculators with it. The old calculators that have it are now “vintage” and incredibly pricey, so I started looking for apps - and I’m glad I did, because this calculator is an absolute gem! It is elegant and clutter free. I have replaced using my iPhone calculator with this one. I love the fact that it has no ads. I would definitely pay for this. Thanks and keep up the good work! :)
Need improvements
I’ve been using a physical 42S and emulator on my phone for years. The down side is that the keys and display font are small. Apple default calculator app, on the other hand, have very large font and large key size, but it’s not RPN. This calculator here has the potential to be a great alternative to both, but it’s not (yet).
1. Stack display is a bit confusing. Took me a while to figure out Y is on top left corner, and then the next 3 levels up on the right. It would be more consistent if you skip the top left corner position, and just have the stack on the right.
2. While alternate functions are activated by long pressing the number keys/layer, in the advanced function keys/layer, it requires pressing ALT then another key. Why the different behavior?
3. Store/recall does not work at all.
Very good calculator
I have a lot of experience using an RPN calculator and own several. This is a nice app to have handy so I don’t have to go search for the more complicated ones in my collection. My only complaint is that it took a bit of time before I figured out how to set the precision; it is in the Help menu, then how to escape the help menu. That nitpicking is not a problem, just a comment.
Developer Response ,
Thanks for the kind words :) Glad you like it. And yes, the initial discovery unfortunately takes a bit to get used to (for anyone reading this - hold down on the HELP button to bring it up and then flick it away to get rid of it). I agree 100% with you.
Unfortunately it was a trade off between guiding the user with more contextual help buttons / options. vs. using all screen estate for the calculator (I chose the latter).
App Privacy
The developer, Ashok Khanna, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Information
- Seller
- Ashok Khanna
- Size
- 951.3 KB
- Category
- Utilities
- Compatibility
-
- iPhone
- Requires iOS 13.0 or later.
- iPad
- Requires iPadOS 13.0 or later.
- iPod touch
- Requires iOS 13.0 or later.
- Mac
- Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
- Languages
-
English
- Age Rating
- 4+
- Copyright
- © 2020 Ashok Khanna
- Price
- Free