A Complex Calc vs RLM

Work with complex numbers, scientific functions and unit conversions on your iPhone. A Complex Calc keeps your expression, result and next step together. EDIT WITHOUT STARTING OVER Place the cursor where you need a correction, reopen your latest submitted expression, or edit History entries that retain their original input. Paste supported expressions and review them before calculating. Undo and redo recent input changes during your current session. USE SCIENTIFIC TOOLS IN PORTRAIT Choose Basic or Scientific without rotating your phone. Keep trigonometric functions, logarithms, powers and constants close, with degree and radian controls. CONVERT UNITS ON THE SAME SCREEN Convert length, area, volume, mass, temperature, speed, energy, power, pressure, time, angles and electrical quantities. Swap compatible units, copy a converted value, and return to your calculator session. KEEP AND SHARE USEFUL WORK Mark History entries as favorites and filter them for quick access. Share a completed or saved calculation as text or a PNG image, with its recorded expression and result. SEE COMPLEX RESULTS CLEARLY Compare rectangular and polar forms, inspect the complex-plane diagram, and copy either representation. Clearer error guidance helps you correct an expression, while automatic scientific notation keeps small nonzero results visible. Requires iOS 18 or later.

The RLM-10CX is a programmable RPN calculator with a special focus on science and engineering. It is based in the Hewlett-Packard HP-10C calculator. It keeps the classic scientific keyboard you already know and its keystroke programming, and adds a complete set of menus and worksheets designed to bring up the most of your iOS devices and , at the same time, conserving the easy of use and all functions originally provided by the real calculator. >Keyboard: •RPN entry with a four-level stack, LAST X and 20 storage registers with register arithmetic. •Trigonometric, logarithmic and power functions, polar-rectangular and hours conversions, statistics with linear regression and estimates directly from the keys. •Keystroke programs of up to 1000 lines with conditional tests and branches, written in a full-screen editor and saved and loaded by name. >Finance Worksheets: •Account Balance: Calculates the balance of cash transactions and interest applied at arbitrary dates. •Loan Amortization: Amortization schedule for a single payment or several payments at once. •Bonds Price & Yield: Calculates the price, yield and effective duration of a bond. •Black-Scholes Options: Calculates the CALL, PUT and “Greeks” values of a Black-Scholes European option. •Cash Flows: NPV, IRR and related answers for equal periods or for cash flows occurring at arbitrary dates. •Depreciation: Calculates depreciation with SL, SOYD, DB, DBX or MACRS methods. •Interest Conversion: Nominal and effective interest conversion. •Time Value of Money: Calculates compound interest problems. >Business Worksheets: •Bill-Tip-Split: Calculates the sharing of a bill with tip. •Break Even: Analyzes the relation Profit = (Price - Var.Cost) • Units - Fix.Cost •Currency Exchange with manual or on-line rates. •Inventory Turn Over. •Percents & Margins: Calculates %Change, %Total and business margins. •Return on Investment. >Date / Time: •Calculates days between dates with Actual, 360 or 365 day calendars, and time intervals between different times. >Statistics Worksheets: •Probability: 16 probability distributions. •(X,N)-List Statistics: One and two variable statistics and curve fitting. •(X,Y)-List Statistics: Two-variable statistics and curve fitting with six regression models. >Scientific Worksheets: •Angles & Polar-Rectangular conversions. •Complex Numbers: Arithmetic and functions of complex numbers in cartesian or polar form. •Combination & Permutation. •Logarithms, Trigonometric, Hyperbolic and Number Alteration functions. •Quadratic Equation solver. •Triangle Solution: Solves plane and spherical triangles. •Universal Constants: The CODATA physical constants values and descriptions. •3D Vectors: Operations with vectors in cartesian, spherical or cylindrical coordinates. >Convert Worksheets: •Angles & Polar, Currency Exchange, Interest Conversion and Units Conversion: physical units conversion, completely customizable. >General Worksheets: •Solver: Solves arbitrary equations entered as text for any of the variables, knowing the others. •Storage Registers: Store and perform operations directly on the calculator's storage registers. •Memory Content: Clear, back up or restore part or all of the calculator's memory. •General Settings: Customize display format, decimals, date format, angle unit, left-handed layout, sounds, haptics and more. •Help Documents: Description and examples of all the calculator worksheets and features. >Editors: To create or edit data •(Date,Trx) and (Date,CF) Lists: Dated transactions and cash flows. •(X,N) and (X,Y) Lists: Data for cash flows and statistics. •Program, Solver Equation and Units Database. System requirements: iOS 26.0 or above. 30-day free trial, then a single one-time Lifetime Purchase of $9.99 USD. No subscription. License Agreement: http://www.apple.com/legal/itunes/appstore/dev/stdeula Disclaimer: THIS IS NOT A HEWLETT PACKARD CALCULATOR, AND IS NOT SPONSORED IN ANYWAY BY HEWLETT PACKARD OR ANY OF ITS SUBSIDIARIES.