# RLM-10CX — Scientific Calculator > Scientific and financial calculator based on HP-10C for iOS devices. (iPhone/iPad app by Ricardo Lira Matte.) - Source: https://appshunter.io/ios/app/rlm-10cx/id6466089794 (this page in markdown: same URL + `.md`) - Developer: [Ricardo Lira Matte](https://appshunter.io/developer/289639238) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.0 · 6 MB - Languages: English - Released: 2023-09-14 - Data updated: 2026-06-08 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/rlm-10cx/id6466089794/reviews.md ## What is RLM? The RLM-10CX application is a general purpose calculator with a special focus in science and engineering. It is based in the Hewlett-Packard HP-10C calculator, but specially 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. >Finance Menu: •Account Balance: Credit line type account based on cash transactions and interest rates applied. •Amortization: Loan Amortization Schedule for a single loan payment or from several payments at once. •Bond Price & Yield: Bonds calculations in an easy way with all options and values at sight. •Black-Scholes Options: CALL, PUT and “Greeks” calculations of the Black-Scholes European option valuation model. •Equal Periods: Calculations with Cash Flows occurring at regular time intervals. •Unequal Periods: Calculations with Cash Flows occurring at arbitrary dates. •Depreciation: Calculates depreciation with SL, SOYD, DB or MACRS methods and conventions. values at sight. •Interest Conversion: Nominal and effective interest conversion. •Time Value of Money: Compound Interest problems involving money earning interest over a period of time. >Business Menu: •Bill-Tip-Split: Calculates the sharing of a Bill with Tip. •Break-Even: Analyze the following relation: Profit = (Price - Var.Cost) • Units - Fix.Cost •Currency Exchange with on-line rates. •Percents & Margins: Calculates %Change, %Total and Business margins. Date / Time Menu: Calculates Date and Time intervals with all values at sight. >Statistics Menu: •One-Variable Statistics: Calculations for one variable data samples. •Two-Variable Statistics: Calculations for two variables data samples. •Curve Fitting: 6 Regression models to fit a curve based on two variables data samples. •Probability: Combinations, permutations, Normal, Exponential, t-Student and Weibull probability distributions. >Scientific Menu: •Complex Numbers: Operations and functions with complex numbers. •Logarithms, Trigonometric, Hyperbolic and Number Alteration functions. •Triangle Solution: Solves a Plane & Spherical triangles. •3D Vectors: Operations and functions with vectors in Cartesian, Spherical or Cylindrical coordinates. •Universal Constants: All the NIST-CODATA physical constants values and descriptions. •Units Conversion: Physical units conversion completely customizable. >Convert Menu: •Angles & Polar: Convert angles between DEG,RAD,GRAD,DMS or Slope % & Polar-Rectangular coordinates. •Currencies: world currencies conversions with manual input or on-line current rates. •Interest Rates: Nominal and effective interest conversion. •Units: Physical units conversions. >Program Menu: Create, edit or load previously saved programs. >Solver Menu: Solve arbitrary algebraic equations entered and saved in the equation editor and creates a menu with all the variables to solve any of them. >Utilities Menu: •General Settings: Customize the calculator to your preference. •Storage Registers: Store and perform operations directly over the calculator’s storage registers. •Memory Content: Shows all memory content edit, backup or restore. •Help Documents: learn by example about all menus. >Editors: submenu to select data editors. System requirements: iOS 15.0 or above. 30 days Free-Trial. In-App-Purchase: One-Payment for life. 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. ## Key features - Finance and Business calculations - Date and Time interval calculations - Advanced Statistics and Curve Fitting - Complex Numbers and 3D Vectors - Unit and Currency Conversions - Equation Solver - Programmable functions ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Lifetime Purchase | $9.99 | one-time | ## Frequently asked questions about RLM ### What is RLM-10CX? RLM-10CX is a general-purpose calculator application for iOS devices, focusing on science and engineering. It is inspired by the Hewlett-Packard HP-10C calculator, offering its functions with enhanced capabilities for modern devices. ### What types of financial calculations does RLM-10CX support? RLM-10CX supports a wide range of financial calculations including Account Balance, Loan Amortization, Bond Price & Yield, Black-Scholes Options, Time Value of Money, and Interest Rate conversions. ### Can RLM-10CX handle complex mathematical operations? Yes, RLM-10CX includes a Scientific Menu with functions for Complex Numbers, Logarithms, Trigonometric and Hyperbolic functions, Triangle Solutions, and 3D Vector operations. ### Does RLM-10CX offer unit and currency conversions? Yes, RLM-10CX features a Convert Menu for Angles, Polar coordinates, world Currencies (with online rates), Interest Rates, and various Physical Units. ### Is RLM-10CX suitable for programming? Yes, RLM-10CX has a Program Menu that allows users to create, edit, and load previously saved programs, enabling custom calculations and automation. ### What statistical functions are available in RLM-10CX? The Statistics Menu in RLM-10CX provides One-Variable and Two-Variable Statistics, 6 Regression models for Curve Fitting, and various Probability distributions like Normal, Exponential, and t-Student. ### What devices is RLM-10CX compatible with? RLM-10CX is designed for iOS devices, including iPhone, iPad, and iPod. It is rated for ages 4 and up. ### How often is RLM-10CX updated? RLM-10CX was last updated on April 26, 2024, indicating active development and support. The current version is 1.0.4. ## Version history (last 5 releases) ### 1.0.4 — 2024-04-26 Now you can listen music while using the calculator. ### 1.0.3 — 2024-04-04 New editor for the Unit Conversion Database. Fix a problem with some devices involving the edition of a units conversions and categories in the database. ### 1.0.2 — 2024-03-07 Fix a bug regarding Accessibility Setting that affect the look of the interface. Now is always drawn well. ### 1.0.1 — 2024-02-18 Fix the issue of Currency Exchange menu where the "Get Rate" stop working since February 16th, 2024. ### 1.0 — 2023-09-14 No release notes. ## Apps similar to RLM | App | Rating | Price | Category | | --- | --- | --- | --- | | [12C Platinum Calculator](https://appshunter.io/ios/app/12c-platinum-calculator/id1536689352) | 5.0 (1) | Free | Utilities | | [Halcyon Calc Lite](https://appshunter.io/ios/app/halcyon-calc-lite/id408004888) | 4.7 (15) | Free | Utilities | | [HP-35](https://appshunter.io/ios/app/hp-35/id6738010641) | 5.0 (5) | Free | Utilities | | [PyCalc](https://appshunter.io/ios/app/pycalc/id1594004797) | 5.0 (15) | Free | Utilities | | [SwiftRPN](https://appshunter.io/ios/app/swiftrpn/id6470951024) | — | Free | Utilities | | [ThetaCalc](https://appshunter.io/ios/app/thetacalc/id1521614636) | 4.3 (4) | Free | Utilities | ## More apps by Ricardo Lira Matte - [RLM-10BX](https://appshunter.io/ios/app/rlm-10bx/id1563019331) - [RLM-17BX](https://appshunter.io/ios/app/rlm-17bx/id1593889938) - [RLM-19BX](https://appshunter.io/ios/app/rlm-19bx/id1597086394) - [RLM-12CX](https://appshunter.io/ios/app/rlm-12cx/id1613759385) - [RLM-12PX](https://appshunter.io/ios/app/rlm-12px/id1613770734) - [RLM-11CX](https://appshunter.io/ios/app/rlm-11cx/id1630739014) All apps by Ricardo Lira Matte: https://appshunter.io/developer/289639238 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-08.*