supercharged buttons&stack: new iOS App

[CFA Newbie]

(08-12-2020 05:41 AM)madstamm Wrote:  Hi Ashok, thanks for the reply and suggestion with google ads! that's a good idea, I will give it a go for sure. I used Swift, as I wanted the app to be compatible with IOS12 - and I think SwiftUI needs IOS13.

by the way, I downloaded your own RPN app, "RPN 30" - great app looks like we both considered RPN to be suitable in combination with the touchscreen. I really think its a fabulous combination!

Do you find the buttons and stack in my app to be intuitive? anything you could recommend to improve the app?

Thanks for your kind words and also for leaving a rating on my app.

I think its pretty intuitive as far as the buttons go and the up/down, left/right gestures.

It appears the app is well suited towards people who work extensively with the stack register, i.e. relatively complex computations vs doing basic arithmetic. I say this as you have dedicated over 50% of the screen to the registers. With this in mind, you can consider strengthening your app’s strong point by adding features that take advantage of this approach. For example, do you have a function that lets you progressively reverse prior operations? Although this can largely be achieved by editing / deleting values from the stack register, since some operations are destructive in terms of removing values from the register once the computation is done, I think it would be really nifty to have an unlimited “reversal” button.

Also I’m assuming you have added in various advanced functions eg financial (npv irr bond pricing etc) and scientific that utilise multiple registers. How about matrix multiplication and calculation of inverses? At least to 4x4 or 5x5

I’d also recommend you porting your app to ipad and Mac OS as with its increased complexity vs normal rpn calculators on iphone, you have a niche market for more advanced computations that are more readily done on a bigger screen.

These are all just thoughts as you asked for suggestions, overall I think you have done a great job, as a fellow developer, I know what you have done is not easy and I really like the visual design, particularly the screenshots on the app store.

I’ve more or less retired from app development and rpn, but you can contact me at ashok dot khanna @ hotmail dot com if you need to bounce any thoughts passed me.

The video you linked above is nicely done.