RPN Calc App Comentários

I love this for my watch it it could really use square root key

I have always liked RPN calculators more than algebraic. This is a fairly simple RPN calculator that works surprisingly well as a widget but also on the Apple Watch. It has a four level stack. It does have an unusual behavior where if the stack is full and you add up all the numbers the number that was on the top of the stack is repeated ad infinitum in the Y position. If you pay attention to what you're doing this should not cause a problem but I found it odd. I would like to see instructions included as well as sound effects in the widget so that when I press on the key there is a click or tone.

Not full screen. Keys are small. Background around calculator bright white making it hard to see. Background should be black or calculator should be full screen.

Simple RPN calculator that keeps me from having to reach for my 30 year old HP-11C most of the time. The ability to do unit conversions is worth the price by itself.

Just as advertised - very clean, simple rpn calculator. It works perfectly, beautifully designed, no crashes. It has all the functions you are likely to need for scientific calculating. The unit conversion feature (actually, quite extensive) is a very nice extra. Suggestions for updates/improvements: have the calc float over the background wallpaper rather than having a completely white background, and ability to position to calc over the background and remember its position. This would be nice when iPad allows multitasking. A row of storage registers might be nice. Maybe showing more registers than the x and y registers is something to consider, but would probaby ruin the beautiful simplicity this calculator displays.

The stack looks like it has been fixed. I found that the tangent of pi yields a -0.00. This could be fixed but overall much better then when I initially downloaded the program. It has become my preferred calculator app.

I downloaded this calculator for the simplicity of RPN and to be able to do simple financial equations with compound interest, NPV... There is no xy register swap key and since the stack is only 1 deep it can't be used for simple interest rate PV functions without writing the starting number down as it gets lost once you enter the interest rate you want to compound. Nice looking, needs deeper register and needs a memory keys.

Works good so far. It would be nice if it remembered the fix/sci decimal settings. Might be nice to have a key to scroll through the stack also. Just got the latest update and the click sound needs to be able to be turned off.

This is not the same as the iphone app. It uses rpn, which you dummies know nothing about. It's good, but a little to simple.

The current version corrects many of the bugs in the initial versions. Thank you. However, the stack still is broken: First a two-position stack on an RPN calculator makes the calculator not very useful. Second, the stack does not work correctly compared to other HP RPN calculators. Specifically whatever is entered in the y position on the stack stays there. Example: 2,enter, 2, + yields 4. Press + again and you get 6(!). What should happen is that the two arguements should be added (and cleared from the stack) and the result displayed in the x position of the stack. On my HP 25 or 48 the result is still 4 (the 48 gives an error message saying too few arguements.

The primary advantage to RNP is the ability to calculate complex arithmetic expressions by simply entering them left to right using the stack (through the enter key). The limited stack depth of this application to one deep completely removes the entire advantage to RNP. Without giving you notice of this limitation, the results are just incorrect for stack entries exceeding 1 deep. Phenominal idea, great price, but very limited usefulness. HP should sell one that works!

When in scientific mode, one can not enter a number with a negative exponent.

Like KevinC123 mine seems to stick in SCI and does not allow you to FIX at 2, 3, 4 decimel places. I dumped it for another RPN calculator with a less desirable layout. My ideal would be something like this one in a horizontal mode but a super simple RPN calc in vertical mode (just the basic +, -, *, /, and inverse plus clr, clrx, and clear last character - this would solve the cramped keys for check book work etc).

With respect to RPN and scientific functions this is a very adequate app. I like that 'log' as well as inverse and hyperbolic trig functions have been included. Counter so some reviews it's always worthwhile to have an extra calculator--that extra being a scientific _RPN_ calculator

Nicely done RPN layout. Could use a "click sound" option, and some financial calc options wouldn't hurt either. One issue is that when using fixed decimal (say 3,4, or 5), it reverts to sci/exponent view long before the available characters are used up. Kind of annoying. Fix that and its 5 stars.