Loans, bonds, cash flows, statistics, a text-equation solver and 3D vectors in one fast calculator. Try everything free for 30 days.
The RLM-17BX is a calculator for 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.
•Interest Rates: 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: Analyze the following 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.
>Cash Flows Worksheets:
•Equal Periods: Cash Flows occurring at regular time intervals.
•Unequal Periods: Cash Flows occurring at arbitrary dates.
>Statistics Worksheets:
•Probability: 16 probability distributions.
•One or Two variables Statistics.
•Curve Fitting: 6 Regression models to fit a curve.
>Scientific Worksheets:
•Angles & Polar-Rectangular conversions.
•Complex Numbers: Operations and functions with complex numbers.
•Combinations & Permutations.
•Logarithms, Trigonometric, Hyperbolic and Number Alteration functions.
•Quadratic Equation solver
•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.
•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.
•General Settings to set classic and new keyboard skins, RPN and algebraic logic, sounds, display format, etc.
>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 26.0 or above.
30-day free trial, then a single one-time Lifetime Purchase. 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.
(Update)The developers responded to my support request and resolved the issue with the editor. It works as intended now. Excellent and responsive support! Unfortunately, one cannot create a conversion with reciprocal units, like L/100km to MPG. The SI value needs to be directly proportional to the Unit, not inversely proportional. Perhaps add an exponent constant in the formula to create a reciprocal? Regardless, I increased my rating. (Old review)There doesn't seem to be a way to add additional unit conversions and when editing an existing, even just changing the name, it resolves to zero. The only way to fix it is to reset all units to default. That being said most of the units one would need are there. It would be nice if there was also a fuel economy conversion, but I created my own using the solver.
Developer Response
This bug was solved in the last update (version 3.1.5 approved in April 27, 2024).Now you can create the Fuel Economy conversions in the Units Convenrsions database editor.
Outstanding
Jmartinfinance
Just love this one. Looks like my physical unit. His work on these calculator apps is just a work of art. Such fine attention to detail. Im a financial advisor and this is one of the best financial calculator apps in the store. I think i own pretty much all the calculator apps he has made.
Developer Response
Thank you very much for your review. We are commited to build the best possible calculator for iOS and is great to be recognized for that as you did.
Questions
Trackerguy
1. Is 17BII+ pro app no long supported? 2. How does the latter differ from this new version? 3. Is there an upgrade discount? 4. Why is there no support page for questions like these?
Developer Response
The old 17BII+Pro is no longer supported and was out of the store.It was replaced with the new RLM-17BX build from scratch using the latest Apple technologies and allows us to offer a fully functional 30 days free trial.Also, it has more convenient editors and new menus that are much faster and accurate. We don't offer discounts because we can't. The sales are anonymous to us and all the process is completely controlled by Apple.For support, please write an email to support@rlmtools.com
Doesn’t Show as Installed
cyberseeker
Great for TVM calculations. The app doesn’t show up in the list of installed apps on the main settings window. Makes me wonder if the app can be trusted. As much as I like the app I have uninstalled it. Hopefully it is really fully uninstalled.
Developer Response
It should appear in the Settings. Look for it almost at the end of the apps list. Anyway, you can trust it !!!We don't collect any data from the user, the app don't post any information in internet, and our apps are completely sandboxed.The only information we get from Internet is the online currency rate for the Currency Conversion menu and the help documents showed in the Help Documents view.
Fix of iOS accessibility issue. Now, the “Accessibility -> Display & Text Size doesn't affect the layout.
Version 4.0.1
The developer, R.L.M. Software, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Ricardo Lira Matte
Size
7.6 MB
Category
Productivity
Compatibility
Requires iOS 26.0 or later.
iPhone Requires iOS 26.0 or later.
iPad Requires iPadOS 26.0 or later.
Mac Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
