New member, RPN Calculator for iOS

[Felix Stehli]

Hi all

This is my first post to this forum, although I have been reading this stuff for quite a while. I am interested in programmable handheld calculators since they came out in the early seventies. As I couldn’t afford an HP-25 (let alone an HP-65…) I had to settle for a Texas Instruments SR-56 (thanks Gene for your interesting talk about this machine which brought some memories back!). Now I am the proud owner of an HP-67 (card reader repaired and battery pack renewed) and I like the sound the calculator makes when a card is pulled in… I still love to program some of these little machines now and then.

Since I wanted to have a RPN calculator with good programming capabilities for my iPhone, I made one of my own. It’s called ThetaCalc and is available for free on the App Store. Maybe you give it a try and let me know what you think.

Cheers
Felix

[agarza]

I really like your calc.

A few suggestions :
Add more memory. (STO AND RCL)
Haptic feedback
ENG notation
Comma separated digits when entering number

.

[tcab]

Nice calculator. The JavaScript programming is a great feature.

An infinite stack, and the ability to enter any JavaScript object onto the stack (strings, lists, dictionaries, etc) would be cool.

[DGM]

Yes. I agree that the JavaScript programming feature is a plus. My favorite iOS calculator app, the Naive Design ND1, has that. Unfortunately, the Naive Design website is no longer owned by the person who created the calculator, so the help function and many other features no longer work.

[OlidaBel]

Hi,
a "square root" button ? I used 0.5 y^x as a workaround.

nice calculator, I keep it

[Felix Stehli]

(05-10-2021 11:59 AM)OlidaBel Wrote:  Hi,
a "square root" button ? I used 0.5 y^x as a workaround.

nice calculator, I keep it

Hi OlidaBel

The button is labeled "sqrt".

Felix

[Felix Stehli]

(05-09-2021 12:23 AM)tcab Wrote:  Nice calculator. The JavaScript programming is a great feature.

An infinite stack, and the ability to enter any JavaScript object onto the stack (strings, lists, dictionaries, etc) would be cool.

Hi tcab

Infinite stack
Yes, I will probably implement this as an optional feature.

JavaScript objects in the stack
Nice idea, however, at the moment it seems to be too much work...

Felix

[Felix Stehli]

(05-08-2021 01:42 PM)agarza Wrote:  I really like your calc.

A few suggestions :
Add more memory. (STO AND RCL)
Haptic feedback
ENG notation
Comma separated digits when entering number

.

Hi agarza

Add memory. (STO and RCL)
Memory registers are primarily useful in the context of programming. Since all programming is done in the JavaScript environment, I don't think this feature is necessary. However, I might consider implementing a history of calculation, so that you can refer to previous results.

Haptic feedback
Will think about it.

ENG notation
Yes, I will probably implement this.

Comma separated digits when entering number
Yes, this will be fixed in the next release.

Felix