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### Author Topic: Judy's TenKey (10Key) award-winning calculator  (Read 19051 times)

#### ScreenManiac

• Supporting Member
• Joined in 2014
• Posts: 109
##### Re: Judy's TenKey (10Key) award-winning calculator
« Reply #25 on: June 20, 2015, 05:44 AM »
For me, Opalcalc sits nicely between the input complexity of the calculator (infix or postfix? Do I start with a number and apply a trig function to it, or start with the function as if I were writing the formula on paper? How do I get at the stats functions again?) and the big iron of the fullblown spreadsheet
-oblivion
Completely agree. After checking it out further, I have to say this makes a nice complement to CalcTape which I will continue using for it's sleek interface. OpalCalc makes it a bit hard to see your caption/ comments sitting at the results to which they belong.

But I am very impressed by its features. Not that I am much of a math guy. But the date-time functions alone are amazing. Easy to create time sheets. He provides a nice Workday example sheet (example #5). And just recently I discovered the smart handling of currency conversion. On the first conversion it will get ALL rates and save them in currencies.txt to have them as up-to-date as possible when you're offline.

Celsius to Fahrenheit, Least Common Mulitiple (to check up on kids' homework), custom units .... I am glad this calculator came up in this thread.

#### Curt

• Supporting Member
• Joined in 2006
• Posts: 7,553
##### Re: award-winning calculator
« Reply #26 on: December 15, 2015, 10:17 AM »
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-Curt
« Last Edit: December 15, 2015, 10:32 AM by Curt »