S3 RPN Calculator with Voice
S3 RPN with Voice provides only basic functionalities of a calculator, but we have added a few nice features like below. (If you are not familiar with RPN, please read the note near the end of this product description).
Date and Time Calculation
Not so many calculators have these functionalities. Calculate the difference between two dates. Find a future or past date. Calculate the difference between two times. Find a future or past time. Say it is now 4:26am. What time is 2 hours 50 minutes from now?
Single-Access Key
Now you do not need to use a shift key to access the yellow functions. The Single-Access Key feature enables you to activate the yellow functions quickly and conveniently.
Integrated Cheatsheet
You don't have to memorize anything. Each of the functions on the calculator has a cheatsheet containing brief description of how the function works, and one or more examples.
Anti-Boring
Are you bored with the look of current calculator? Inside the calculator there is a collection of paintings by Claude Monet that you can set as the calculator’s background.
Voice Recognition
Instead of tapping the screen to input numbers and activate functions, you can now speak the keystrokes into the microphone, something like “nine square root”. And S3 RPN will respond by saying on the speaker: “nine square root”, “three”!
Undo
You can undo the steps all the way to the beginning of a calculator session.
Note on RPN
Kindly note this is a calculator that works based on the RPN logic. In RPN there is no equal sign, and parenthesis are not needed. Although all the keys and functions in the calculator has a cheatsheet, if you are not familiar with RPN you might want to search some tutorial on RPN to better understand how it works.
For instance, in RPN to calculate 2 + 5 you use the keystrokes 2 [ENTER] 5 [+]. So when you tap 2 + 5 but do not see 7 on the display, please do not write a typical one-star review saying “wrong answer” or “it doesn’t work”.
Note on Voice Recognition
Please do not speak long commands. Instead of speaking "two enter five multiply nine divide" in one go, break it up into several steps like so.
"two enter"
"five multiply"
"nine divide"
In each of the above steps, wait for the calculator to repeat what it has heard and/or speak out the result, before proceeding to the next step.
Speech data is processed by Google servers for online recognition and locally for offline recognition. Online recognition can recognize spoken words more accurately but it requires internet connection.
Accuracy of voice recognition depends on many factors that are beyond the reach of the app. If the voice recognition feature fails you, please consider this before writing a review and complain. At any rate, contact us at [email protected] if you need some assistance, or if you want to give some feedback which is very much appreciated.
PRIVACY POLICY
If you use the voice recognition feature of the app, the "allow to record audio" permission is required so you can speak the commands into the microphone. For online recognition, the app utilizes Google servers to process voice data. Other than for this purpose, S3 RPN does not collect, store, or transmit information that relates to its users.
Category : Productivity
Reviews (15)
I've not used this much yet, but I'm a fan of RPN, having learned it decades ago on an HP calculator. RPN is fairly intuitive - if you saw an expression on paper, perhaps with parentheses, RPN is basically what you'd do if you were solving that expression by hand. I was a little surprised, however, to find that this is not a Scientific calculator, i.e. no trig functions, factorials, logs, etc.. If you have no need of these functions (or maybe don't even know what they are), this app is great, but if you do want them you'll need to look further.
Very nice app. I'd prefer a secondary button in addition to the swipe for second function but it's a great app. Very polished.
no widget mode and can't use the yellow math functions.
Great app.... does just what I need it do ! No longer need all of the stuff on the HP RPN calculators.
Simple clear layout, easy to see operation & results
As an engineer and HP RPN user for 40 years, it is great to be able to use RPN again. Now just waiting for HP 12B RPN. We'll done team.
Nice app but is it still at version 1.0?
The exact calculator I was looking for... thanks!
Perfectly great for those who love RPN!
Accurate and fast. Many of these calculators have problems with key registration or are just slow or have more functions than I need. This one is perfect with a great layout and look. Many thanks.
Perfect everyday RPN calculator. Well thought out improvements on the user interface. Accessing the shifted functions is so intuitive, brilliant!
I don't need a complicated calculator but it has to be RPN. So this app is perfect. Love the time function and the undo feature. Thanks.
The layout and basic functionality of this RPN calculator is amazing. It has become my go-to number cruncher.
Why the hell do you put the numbers on the left of the screen. Have you never used a real calculator yourself?
The interface is very well designed, but functionally there are real problems. After pressing Enter it copies the entered value so it is like having two of the same value on the stack -- until you start entering a new value. And thus, you can't do an operation after pressing Enter. It's annoying. Finally the voice controls are cool, but too slow to be useful. It's too bad, this would be a nice app if these (and a few other) issues were fixed.