Halcyon Calc vs my57

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.

Relive the classic 1977 Programmable 57 pocket calculator — faithfully recreated for iPhone, iPad, and Mac. my57 is a cycle-accurate emulator running the same ROM microcode as the original hardware. Every function, every keystroke, and every quirk — including its number formatting and error-blinking display — is reproduced exactly, not reimplemented. AUTHENTIC HARDWARE • 12-digit red LED display with a diffuser-glass texture and optional LED Glow • Real Speed mode runs at the original ~5,000 cycles/second, or switch to Turbo for instant results • Two documented factory ROM revisions (rev0/rev1) to choose from • Algebraic Operating System (AOS) entry, exactly like the original FULL PROGRAMMING SUPPORT • 50 program steps with LRN (Learn) mode • 8 addressable memory registers • GTO, subroutines (SBR), conditional branches (x=t, x≥t), and Dsz counting loops • Scientific notation, trigonometric functions, logarithms, and statistics (mean, variance, standard deviation) BEYOND THE ORIGINAL • Program & Memory panel — see every step's code and mnemonic, edit registers directly, insert/delete steps with undo • Saved program library — save, rename, and organize your programs • Share programs as .my57 files via Mail, Messages, AirDrop, or any app • iCloud Sync keeps your programs, registers, and library current across every device BUILT-IN USER'S GUIDE A complete guide is right inside the app — covering the interface for newcomers, plus a full programming tutorial with worked examples (loops, subroutines, factorials, linear regression, and more) for anyone who wants to actually learn to program it. DESIGNED FOR EVERY DEVICE • iPhone: portrait, full-screen • iPad: side-by-side program panel in landscape • Mac: resizable window with full physical keyboard support