# RLM-19BX — Finance & Science calculator > Advanced finance, business, science, and statistical calculator with specialized worksheets. (iPhone/iPad app by Ricardo Lira Matte.) - Source: https://appshunter.io/ios/app/rlm-19bx/id1597086394 (this page in markdown: same URL + `.md`) - Developer: [Ricardo Lira Matte](https://appshunter.io/developer/289639238) - Category: Productivity, Finance - Price: Free with in-app purchases - Rating: 4.83/5 from 6 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 6 MB - Languages: English - Released: 2021-12-21 - Data updated: 2026-06-05 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/rlm-19bx/id1597086394/reviews.md ## What is RLM? The RLM-19BII is a general purpose calculator with a special focus in finance, business and science. It is designed to bring up the most of your iOS devices with an extensive set of worksheets and enhancements to cover most of the functions generally needed by financial, business, mathematical, engineering and scientific professionals. >Finance Worksheets: •Account Balance: Calculates the Balance of cash transactions and interest applied at arbitrary dates. •Amortization: Loan Amortization Schedule for a single or several loan payments. •Bond 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. •Depreciation: Calculates depreciation with SL, SOYD, DB or MACRS methods and conventions. •Time Value of Money: Calculates compound Interest problems. >Business Worksheets: •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 manual or on-line rates. •Percents & Margins: Calculates %Change, %Total and Business margins. >Cash Flows Worksheets: •Equal Periods: Calculations with Cash Flows occurring at regular time intervals. •Unequal Periods: Calculations with Cash Flows occurring at arbitrary dates. >Statistics Worksheets: •Probability: Combinations, permutations and Normal, Exponential, t-Student and Weibull probability distributions. •One-Variable Statistics: Calculations for one variable data samples. •Two-Variable Statistics: Calculations for two variables data samples. •Curve Fitting: Regression models to fit a curve based on two variables data samples. >Scientific Worksheets: •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. >Conversion Worksheets: •Angles: Convert angle between DEG,RAD,GRAD,DMS and Slope %. •Currencies: world currencies conversions with manual input or on-line current rates. •Interest Rates: Nominal and effective interest conversion. •Polar-Rectangular: Coordinates conversion. •Units: Physical units conversions. >General Worksheets: •Date: Calculates days between dates with Actual, 360 or 365 days calendars. •Time: Calculates time intervals between different times. •Solver: Calculates arbitrary equations entered as text expression to solve any of the variables knowing the others. •Storage Registers: Store and perform operations directly over the calculators storage registers. •Memory Content: Clear, Back-Up or Restore part or all of the Calculator's memory. •General Settings: Customize many aspects of the calculator including formats & feedbacks. •Help Documents: Description and examples of all the calculator worksheets and features. >Editors Worksheets: To create or edit data •(Date,Trx) List: Transactions and the dates they occurs for the "Account Balance Worksheet". •(Date.CF) List: Cash flows and the dates they occurs for the "Unequal Periods Cash Flows Worksheet". •(X,N) List: Cash flows and repetitions for the "Equal Periods Cash Flows Worksheet". •(X,Y) List: X and Y data samples for the Statistics worksheets. •Solver Equation: Algebraic expression for use in the "Solver" worksheet. •Units Database: Customize the "Units" worksheet. 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 worksheets (amortization, bonds, options) - Business tools (bill split, break-even, currency) - Statistical analysis (probability, regressions) - Scientific functions (complex numbers, vectors) - Unit and currency conversions - Equation solver - Date and time calculations ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthly Subscription | $0.49 | per month | | Semi-Annual Subscription | $2.99 | per 6 months | | Annual Subscription | $5.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Lifetime Purchase | $9.99 | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/rlm-19bx/id1597086394/reviews.md ### 5/5 — Great digital version of my beloved HP-19Bii *2024-11-24* It works just like the original with all the functions and solver. 5/5 stars! Thank you for keeping it alive! ### 5/5 — Best RLM Calculator *2022-04-18* I have purchased one or two RLM calculators before. I really like their 12C calculator. However, this is their best one. I always liked the HP19bII. The RLM implementation is just perfect. Not photo realistic, but everything you need is there. It’s now the only calculator on my phone. ## Frequently asked questions about RLM ### What types of financial calculations can RLM-19BX perform? RLM-19BX offers specialized worksheets for account balance, loan amortization, bond pricing and yield, Black-Scholes options, and various depreciation methods (SL, SOYD, DB, MACRS). It also handles Time Value of Money calculations. ### Does RLM-19BX support currency conversions? Yes, RLM-19BX includes currency exchange functionality with options for manual input or online rates. It also offers interest rate conversions between nominal and effective rates. ### Can RLM-19BX solve custom equations? Yes, RLM-19BX features a solver that can calculate arbitrary equations entered as text expressions. You can solve for any variable by knowing the others. ### What scientific functions are available in RLM-19BX? RLM-19BX supports complex number operations, logarithms, trigonometric, hyperbolic functions, number alteration, triangle solutions (plane and spherical), and 3D vector operations in Cartesian, Spherical, or Cylindrical coordinates. ### How often is RLM-19BX updated? The latest version, 3.1.5, was released on April 26, 2024. Updates are frequent, indicating ongoing development and support for the app. ### What devices is RLM-19BX compatible with? RLM-19BX is designed for iOS devices, including iPhone, iPad, and iPod. It is rated for ages 4 and up. ### What are the subscription options for RLM-19BX? RLM-19BX offers a free version with in-app purchases and also provides subscription plans. These include a Monthly Subscription for $0.49, a Semi-Annual Subscription for $2.99, and an Annual Subscription for $5.99. ### Does RLM-19BX have ads? Based on the provided data, RLM-19BX does not have advertisements. Its monetization model is free with in-app purchases and optional subscriptions. ## Version history (last 5 releases) ### 3.1.5 — 2024-04-26 Now you can listen music while using the calculator. ### 3.1.4 — 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. ### 3.1.3 — 2024-03-07 Fix a bug regarding Accessibility Setting that affect the look of the interface. Now is always drawn well. ### 3.1.2 — 2024-02-18 Fix the issue of Currency Exchange menu where the "Get Rate" stop working since February 16th, 2024. ### 3.1.1 — 2023-09-07 Fixed a bug in version 3.1 regarding keys bad behavior. ## Apps similar to RLM | App | Rating | Price | Category | | --- | --- | --- | --- | | [JRPN 15C](https://appshunter.io/ios/app/jrpn-15c/id6484504019) | 5.0 (5) | Free | Productivity | | [WP 34s](https://appshunter.io/ios/app/wp-34s/id620255094) | 4.7 (28) | Free | Productivity | | [RPN-70 SD](https://appshunter.io/ios/app/rpn-70-sd/id738422213) | 4.7 (11) | Free | Productivity | | [DB40X](https://appshunter.io/ios/app/db40x/id6624315901) | 4.7 (7) | Free | Productivity | | [Scientific Calculator *](https://appshunter.io/ios/app/scientific-calculator/id1537346972) | 4.6 (8) | Free | Productivity | | [RPN-65 SD](https://appshunter.io/ios/app/rpn-65-sd/id1176059659) | 5.0 (8) | $2.99 | Productivity | ## 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-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 2026-06-05.*