Perpenso Calc1.5.1 - App Store

Perpenso Calc is five calculators in one fully paid app: scientific, statistics, business, hex and bill/tip. All five modes are included, there are no longer any optional modes. Perpenso Calc 4 is a related lite app with optional modes. Perpenso Calc is offered at a discounted price and may cost less than adding all your desired functionality to Perpenso Calc 4.

Perpenso Calc includes:

A calculator tape

A built-in manual

Nine color schemes

All calculators offers:

Copy and paste

Optional RPN entry

Decimal based arithmetic (no binary rounding)

20 digit precision (enough for 64-bit arithmetic)

10 memory registers

Customizable display lines (iPad only)

Scientific mode provides:

72 operations (43 complex number)

Fractions

Complex numbers, cartesian and polar

2D rotation

Scientific and engineering notation

Unit and time conversions

Statistics mode includes:

42 operations

Optional worksheet for data entry/editing and viewing common stats

Importing data from the web

Single and two variable data

Swap XY data

Mean, weighted mean, geometric mean, median and mode

Z-score

Standard deviations

Covariance and correlation

Percentile

Sums

Linear regression including slope, y-intercept, predicted x/y, SSE and SSR

Combinations

Permutations

Geometric, hypergeometric, poisson and binomial probability functions

Business mode offers:

53 operations

Optional worksheets for data entry/editing and performing common calculations

Breakeven point

Profit margin

Time value of money

Amortization

Cash flows

Interest rate conversion

Running total

Hex mode provides:

43 operations

Optional worksheets for data entry/editing and performing common conversions

Decimal, hex, octal and binary

64-bit and 32-bit modes

Unsigned and signed modes

Bitwise operators

Byte swapping

UTF-8, UTF-16 and UTF-32 encoding, decoding and conversions

IEEE single and double precision floating point encoding and decoding

Dotted quad encoding

RGBA decoding with a preview of the color

Bill mode allows you to:

Add items to a scrollable list

Set item quantity

Set the percentage of an item that you are responsible for

Set tax and tip percentage

Set tax and tip amount

Split the total

Send itemized bill to calculator tape

Enter/edit items and view some calculations on an optional worksheet

Efficient and explicit calculations.

RPN is an optional entry method that gives you explicit control over calculations without using parenthesis. RPN is a favorite of many handheld calculator users.

20 digit precision, enough for 64-bit arithmetic.

Many calculator apps use the hardware floating point unit (FPU) and are limited to around 16 decimal digits of precision, far fewer than the 20 needed to perform 64-bit arithmetic. Perpenso Calc is always using 20 digits of precision internally.

Decimal arithmetic, no binary rounding.

Can other calculator apps calculate 0.5 0.4 0.1 = 0? Surprisingly many cannot and display a very small number rather than zero. The FPU performs binary arithmetic and as numbers are converted between binary and decimal small rounding errors can occur. Handheld calculators use decimal arithmetic, not binary, to avoid such rounding errors. So does Perpenso Calc.

Seamless support for fractions.

In Perpenso Calc fractions are generally interchangeable with decimal numbers. Nearly all calculations accept fractions and will return a fraction when the operands are fractions. Fractions may be displayed as, and converted between, proper and improper forms.

Better support for complex numbers than many handheld calculators.

Most mathematical operations in Perpenso Calc accept complex numbers, more operations than many handheld calculators. Complex numbers may be displayed as, and converted between, cartesian and polar forms.

Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.