Halcyon Calc icon

Halcyon Calc

Halcyon Touch Software

4.9

17 ratings

$4.99

In this calculator app, users can manipulate numbers, perform unit conversions, and work with symbolic expressions. Includes features like plotting expressions, solving equations, and statistical calculations.

AppRecs review analysis

AppRecs rating 5.0. Trustworthiness 70 out of 100. Review manipulation risk 17 out of 100. Based on a review sample analyzed.

★★★★★

5.0

AppRecs Rating

Ratings breakdown

5 star

88%

4 star

12%

3 star

0%

2 star

0%

1 star

0%

What to know

Low review manipulation risk

17% review manipulation risk

Credible reviews

70% trustworthiness score from analyzed reviews

High user satisfaction

88% of sampled ratings are 5 stars

About Halcyon Calc

For students, engineers, scientists or people who fondly remember classic calculators, Halcyon Calc is a great application for manipulating numbers and even symbolic expressions.

Features:
- Use this calculator on an iPhone, iPod Touch or an iPad
- Use your finger to quickly scroll through the stack to review intermediate results
- Copy and paste support
- Over 225 built-in operations, including trig, logarithms, real functions, complex operations and more
- Allows you to work with real, complex and integer numbers.
- Real and complex numbers can be displayed in standard, fixed, scientific and engineering format
- Use over 120 built-in units to perform unit conversion or create your own units if the one you want is not already there
- Integer numbers can be displayed in decimal, hexadecimal, octal and binary bases
- Work with real and complex matrices and vectors.
- Enter symbolic expressions and solve them for different values. Even better, solve quadratic formulas, collect and expand factors and terms, find minima, maxima and roots of any expression.
- Plot symbolic expressions in X/Y coordinates. Pan the coordinate space by dragging the plot in any direction. Zoom in and out using a pinch gesture.
- Determine symbolic derivative, taylor series or numeric integral of an expression.
- Store numbers, lists, strings and expressions in symbols. Create hierarchies of symbols to allow you to organize your calculations.
- Create sequences of calculator commands into programs, creating your own operations which you can then include in expressions.
- Store statistical data and calculate totals, averages, standard deviations, linear regressions, etc over that data.
- Calculate the probabilities associated with standard distributions like the normal, F and T distributions.
Halcyon Calc Screenshots
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Reviews for Halcyon Calc

confusedbankuser

Great simulator of a great calculator and a great app

This is truly one of the best. Faithful reproduction of the HP-28S, the first user RPL calculator, that keeps all the good stuff and improves on the not-so-good (the display, for example, is so much better than that on the actual calculator). Stable and well thought out, with a very polished look. The plotting capabilities are pretty amazing. Very responsive developer; helped me immediately with a workaround to a minor problem and released an update within a few days. Allows me to do anything I used to do with my old 28S, and without the creaking plastic clamshell case sound! Highly recommended and worth every penny of the price. Hope to see more from this developer.

tmcquade

Best Calculator out there

Love how responsive Halcyon Software is to fixing and improving this software. My favorite change on this release is the long or 3D press to get the red shift key. My 28S still runs perfectly but the battery door is so fragile. I can use Halcyon Calc all the time.

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