Reviews (27)
Perfect, a modern, minimal RPN calculator that can be used as a drop-in replacement for the Android calc. Just one issue: at a larger font size, the last row becomes tiny and almost unusable.
Perfect for everyday use. The best RPN calculator to replace the standard calculator on your phone. The large keys and perfect layout makes it easy to use and has extra math functions to put it a cut above the rest.
It's great. Adfree, pretty and performant. The only thing missing are a few operators, notably logarithmic ones.
Nice to have a basic RPN calculator for my smartphone. There are a few things I do not like about this one though. Like why is it that when I input a number like 1274.08 enter 1227 minus, the result is 47.079999999999.... and not 47.08??
Don't know why I can't edit my last review, but I want to stick to my word. This is a gold standard in utility apps. Does what it says. Does it well. Has a *very* responsive developer. Honestly, this is cleaner than some paid apps I've tried. I guess it doesn't really do much in the way of explaining how RPN works, but let's be honest, you wouldn't be reading this review if you didn't know what RPN was lol.
It looks clean, it's ad-free, it uses no permissions, and it's RPN. Could use a more attractive app icon, though.
Why did the drop, swap, delete and clear buttons got symbols now? They are confusing and weird, it was much better with text.
Very nice, best rpn calc found so far. The only gripe is lack of black theme for the OLED screens.
Nice, simple and clean. A great everyday calculator for those who are familiar with RPN.
Doesn't work with Samsung DEX - cannot perform operations using a keyboard.
no scroll. no click on button press. no reset. jumps resolutions to fit keyboard at times
What happened to the app and the layout? Not an improvement. Used to love this app but will uninstall it now
2 stars for rpn, loss of all remaining stars for no widget mode.
Thanks for fixing this, best design rpn calculator.
Simple and clear RPN.
I like the calculator. It's not trying to be an old HP. My only wish is to have haptic feedback or sounds when using.
Won't clear
Nice simple, attractive rpn calculator, just what I wanted. Other rpn calculators try to mimic HP and are overloaded for what I need on my phone.
I really like having a basic RPN calculator with a clean design that doesn't try to mimic LCD's. I occasionally get floating point errors though
I very much like that it makes no attempt to be an HP. It is RPN. It is an app. Those are good enough. Trying to be a handheld calculator is fitting a square peg into a round hole.
The only thing I miss is an undo button.
Perfect everyday calculator replacement for rpn users. Simple, clear, and straightforward. Exactly what you need from a phone calculator. Fancy stuff for coursework, exams etc gets done on the real calculator, but for basic everyday calculations, this is ideal. I'd give 6 stars if I could.
Great app. For better ease of use, I'd label division as ”y / x", since it isn't at first clear which one is the divisor.
As long as you don't need all the fancy trig or scientific functions, this is by far the best everyday RPN calculator. Thank you, Andrew!
Great basic RPN calculator. The key layout is perfect and it uses a stack. My only complaint is there is no portrait mode. Still these beats most of the calculators out there.
Simple and clean layout
Overall, an excellent basic RPN calculator. I do have a bit of an issue with the roundoff error that keeps showing up: e.g., type 9, then [1/x] twice, and you get 9.000...001etc. It happens on other calculations too, like square root. EDIT 2021-09-29: Thanks for the fix!