Was great..
Loved this app and used it all the time. It no longer works with the current iOS. Stopped sometime in 2020. Wish it was updated to run again. Holding onto it, just in case....METAL_DRUMMER70
Stopped Working with iOS 14.2
Sad to see the App no longer functioning after Apple’s latest iOS update, 14.2. I still have and use my 40 year old HP 15C daily. The app was handy when away from my desk.Pain in the ......
Not working?
Worked great for years. Marvelous app. Stopped working with latest iOS update. So sad. Looking for a substituteHope UCC
Great RPN calculator
I really like this calculator. The only addition I’d love to see is haptic feedback with each key press. That would emulate the soft click of the actual calculator.TonyGixxer
App quit working
Any chance there will be an update so this will work on my iPhone?PJLC
Wonderfully wonderfully splendid
What a wonderful app. I just bought a used 15c for 200$ .....had to suffer with the 12c for years. Children of the 2000’s this is the best calculator that has ever been created. And in the 80’s in high school I saved to buy. To the creator of this app....good on you for creating.... wonderfully wonderfully splendid !Monty808808
Love the App
It feels so natural going back to RPN. I Started with a HP-35. But I am afraid I am going to not be able to use it since I up graded from a 7 plus to a iPhone 11. It seems that the app doesn’t understand the swipe up motion to turn it off, I have to completely reboot the iPhone to get the app off the screen. I hope this is fixable as I will truly miss it.NotAUser2010
Great app
Thanks for putting this fantastic free app out there. I used this model for years and love rpn. Good job!GodzillaRodan1999
Truly awesome simulator
Executes fast and it’s true to the original. I would pay for it.JoeM
Stopped working with ios 13
I love this RPN calculator but now that have a new iphone 11, the app will open and function, but not close. You cannot get out of it without rebooting. Will it be updated?Lighttrick8
