# RLM-10BX — HP-10BII calculator simulation

> HP-10BII calculator simulation for finance, business, and scientific calculations. (iPhone/iPad app by R.L.M. Software.)

- Source: https://appshunter.io/ios/app/rlm-10bx/id1563019331 (this page in markdown: same URL + `.md`)
- Developer: [R.L.M. Software](https://appshunter.io/developer/289639238)
- Category: Finance, Business
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 7 MB
- Languages: American English
- Released: 2021-10-19
- Data updated: 2026-08-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/rlm-10bx/id1563019331/reviews.md

## What is RLM?

The RLM-10BX application is a general purpose calculator with a special focus in finance and business. It is based in the Hewlett-Packard HP-10BII calculator series, 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.
Get it for free during 30 days (after you have to buy an In-App-Purchase subscription product or one payment for lifetime).

The RLM-10BX has a extensive Menu System:

>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 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:
•One-Variable Statistics: Calculations for one variable data samples.
•Two-Variable Statistics: Calculations for two variables data samples.
•Probability: Combinations, permutations and Normal, Exponential, t-Student and Weibull probability distributions.

>Scientific Worksheets:
•Angles & Polar: Convert angles and coordinates.
•Logarithm functions with common or arbitrary base.
•Number Alteration functions
•Triangle Solution: Solves a plane triangle.
•Trigonometric & Hyperbolic functions.

>Conversion Worksheets:
•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.

>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: Monthly, Semi-Annual and Annual Auto-renewable subscriptions or 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, bond price, time value of money)
- Business calculations (bill split, break-even, currency exchange)
- Cash flow analysis
- Statistical functions
- Scientific and trigonometric functions
- Unit and currency conversions
- Date and time calculations
- Equation solver

## 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 (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/rlm-10bx/id1563019331/reviews.md

### 2/5 — Doesn’t work

*2022-09-15*

Looks good, all the functions work, but it’s not an accurate calculator. Tried all kinds of functions like interest rate conversion, calculating outstanding balance, all the values were wrong.

It operates smoothly and does have some cool features, could easily be a 5 star app if the calculations were right.

**Developer response:** Please contact us directly to analyze what calculation are you doing and what goes wrong with them.
For example, a common mistake in TVM calculations if set a wrong P/YR value.

### 1/5 — 6 hour trial

*2022-03-04*

Ridiculous

**Developer response:** The 30 days free trial period starts from the date of the first run of the app.

### 1/5 — False advertising

*2022-01-18*

It's not free. And supposedly 30 days trial. I only got 4 days.

**Developer response:** The 30 days free trial period starts from the date of the first run of the app.

## Frequently asked questions about RLM

### What financial calculations can RLM-10BX perform?

RLM-10BX offers extensive financial worksheets, including Account Balance, Amortization schedules, Bond Price & Yield calculations, Black-Scholes Options analysis, Depreciation methods, and Time Value of Money problems.

### Does RLM-10BX support business calculations?

Yes, RLM-10BX includes business worksheets for Bill-Tip-Split, Break-Even analysis, Currency Exchange with online rates, and Percents & Margins calculations.

### What are the subscription options for RLM-10BX?

RLM-10BX offers a 30-day free trial, after which you can choose a Monthly Subscription for $0.49, a Semi-Annual Subscription for $2.99, or an Annual Subscription for $5.99. There is also a lifetime purchase option.

### Is RLM-10BX available on Android devices?

Based on the provided data, RLM-10BX is designed for iOS devices, specifically iPhone, iPad, and iPod.

### How often is RLM-10BX updated?

The application was last updated on April 26, 2024, indicating regular maintenance and potential feature additions. The latest version is 3.1.4.

### What is the age rating for RLM-10BX?

RLM-10BX has an age rating of 4+, making it suitable for a wide range of users. It is designed for general purpose and financial calculations.

### Can RLM-10BX solve arbitrary equations?

Yes, RLM-10BX features a Solver worksheet that allows you to enter arbitrary equations as text expressions and solve for any variable, provided the others are known.

### Does RLM-10BX have ads?

No, the application does not contain advertisements. Its monetization is based on in-app purchases for continued use after the initial free trial period.

## Version history (last 5 releases)

### 3.1.4 — 2024-04-26

Now you can listen music while using the calculator.

### 3.1.3 — 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.

### 3.1.2 — 2024-03-07

Fix a bug regarding Accessibility Setting that affect the look of the interface.
Now is always drawn well.

### 3.1.1 — 2024-02-18

Fix the issue of Currency Exchange menu where the "Get Rate" stop working since February 16th, 2024.

### 3.1 — 2023-09-05

- Lots of refinements in all menu views.
- Small layout bugs in iPad fixed.
- Improvements in performance and stability.

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## More apps by R.L.M. Software

- [RLM-17BX](https://appshunter.io/ios/app/rlm-17bx/id1593889938)
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All apps by R.L.M. Software: https://appshunter.io/developer/289639238

## Related topics

[hp 10bii](https://appshunter.io/ios/topics/hp-10bii) · [10bii](https://appshunter.io/ios/topics/10bii)

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*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 2026-08-01.*