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100,000 - 500,000 downloads
by adam white on 07/05/2015
Beautifully designed and perfectly executed. Had no hesitation in purchasing full version. Many thanks to devs.
by Nigel Coldwell on 07/05/2015
Great calc. Remember it from the good old days.
by Jovan Gardner on 07/05/2015
I don't even know where my actual calculator is
by sdrtyrty rtyuty on 05/05/2015
your app says I didn't.
by Douglas Turner on 03/05/2015
I originally downloaded the app just to get the RPN input I so love. I bought the pro version of the app within a week. This is one of the first 5 apps to get installed on a new device.
by Luke Abraham on 03/05/2015
A truely excellent calculator, and well worth buying the premium version. Also, a feature I requested by email has now been included, which I am very greatful for. The best App I have bought and installed.
by Simon Cleeve on 02/05/2015
Does everything I could ever want. Why aren't standalone calculators this good? Thanks to the developer.
by Jeremiah Deschine on 30/04/2015
Love it more than LSP loves her lumps.
by Paul Hillman on 29/04/2015
I have paid for this plus version as I feel it is worth the money. It does what I need and works like the real device. Has replaced my actual calculators I carried around for my work as an engineer. Why not 5 stars, well things can always be improved.
by Freek de Bruijn on 29/04/2015
Very advanced calculator which reminds me of the dedicated device that I used to have in the previous century. Takes a bit of time to learn, but it's definitely worth the investment for me!
by Rob McMahon on 29/04/2015
This is a truly great calculator, and the addition of undo, and Indian grouping has made it indispensible. Well worth paying the little extra for.
by D CONWAY on 29/04/2015
Just like my old school calculator. :-D
by Kip Krauss on 28/04/2015
One of the best calculators I have come across. Great Job.
by Darnley Bynoe on 28/04/2015
Used it constantly, bought the paid app cause felt guilty using this much quality for free. Thanks guys.
by Greg Neilson on 28/04/2015
A good scientific calculator is so reassuring, especially when it comes with RPN. I have used it for a while and I am happy to pay for the pro version just as a way of saying thanks to the developer. Worth it many times over!