Comparison

10BII Calc HD vs RLM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

10BII Calc HD

This advanced calculator offers over 100 functions for business, finance, math, and statistics. It simplifies complex calculations like loans, cash flows, and depreciation with an intuitive interface and specialized worksheets. Includes interactive graphs and an audit tape for tracking all computations.

Highlights
  • Over 100 business, finance, math, and statistics functions
  • Time Value of Money calculations with TVM solver
  • Cash flow analysis with dedicated editor
  • Statistical analysis and forecasting
  • Currency and unit conversions
  • Interactive graphs and audit tape
Features
Currently charting
Read full description

10BII Calc HD is a business calculator featuring over 100 built-in functions for business, finance, mathematics and statistics. Easily calculate loan payments, interest rates, amortization, discounted cash-flow analyses, TVM (loans, savings, and leasing), bonds and depreciation using a simplified algebraic entry system. The keyboard and display have been carefully optimized for the iPhone, iPod Touch and iPad. Two keyboard layouts and multiple specialized worksheets allow you to do much more than a 10BII calculator while maintaining compatibility with the standard.
 HD version includes: • 2 for the price of 1! iPad and iPhone versions included- use on both your iPad and iPhone • HD graphics included for iPad and iPhone retina displays • iPad version includes full support for slide over and split views. • New worksheets including interactive graphs. 
Features:
 •Time Value of Money- Loans, savings, leases and amortization schedules using both the standard keyboard and a specialized TVM solver window that displays the contents of all the variables for rapid "what if" solutions to your problems. View and mail amortization tables. •Interest Conversion- Nominal and effective rates. •Cash Flows- Net present value, internal rate of return, net future value and net uniform series calculations. Up to 80 cash flows are easily edited and reviewed using the dedicated cash flow editor screen. Entries are added, deleted and modified in a scrolling display with a touch interface unique to the iPhone. •Business Percentages- Percent change, markup, and margin calculations. •Statistics- Mean, standard deviation, correlation coefficient, and linear regression forecasting, weighted mean. Sample editor and plotter, forecasting using linear, log, exp or power fit. •Conversions- 47 world currency rates and over 100 commonly used metric, english and other conversion factors used in financial, business, scientific and engineering calculations. •Scientific- sin, cos, tan, asin, acos, atan plus the hyperbolic trig functions, conversion between rectangular and polar coordinates, conversion between degrees and radians, time functions including h.ms+ and h.ms-, log, ln, 10^x, e^x, y^x, x root of y, fraction part and integer part. Trig functions can be computed in radians, degrees or gradians. •Worksheets- Auto Purchase Black-Scholes Bond BreakEven Cash Flow Analysis Currency Date Depreciation Interest Conversion Lease Loan Amortization Margin & Markup Refinance Statistics Tip TVM Many of the worksheets include interactive graphs. •Audit tape records all calculations. Tape can be mailed, texted or printed. Discover how to use any function on the keyboard by touching the ? key then the key you want to learn about. Help screens are available for all worksheets. 
Quote from a customer:

"Last week I had a meeting with my accountants and my bankers. We were working on the pro forma balance sheets and cash flows for a new project I'm working on.

They were all asking why I had switched to the iPhone for I used to be a die hard "brandX phone" fan. I said that one could do so much more. They said "yea...sure" (they were all using "brandX phones") until I started using your calculator. We were analyzing different payment and amortization schedules. They were so impressed by how easily we could figure out the amount of interest, principal and remaining loan balance for any certain period or combination of periods that in the end they were saying "I have to get me one of those".

 Great product. Thanks."

About

RLM

This app offers a comprehensive suite of financial and business calculation tools, inspired by a popular professional calculator. It features specialized worksheets for loans, bonds, options, depreciation, and time value of money, alongside business, cash flow, statistics, and scientific functions.

Highlights
  • Finance Worksheets (Amortization, Bonds, Options)
  • Business Calculations (Break-Even, Bill Split)
  • Cash Flow Analysis
  • Statistical Functions
  • Scientific Calculator
  • Unit and Currency Conversions
  • Equation Solver
Features
Read full description

The RLM-BA2 application is a general purpose calculator with a special focus in finance and business. It is inspired by the Texas Instrument BAII+Professional calculator, but specially designed to bring up the most of your iOS devices. The RLM-BA2 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 •Trigonometric & Hyperbolic functions. >Conversion Worksheets: •Angles & Polar: Convert angles between DEG,RAD,GRAD,DMS or Slope % and 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: One-Payment for life. License Agreement: http://www.apple.com/legal/itunes/appstore/dev/stdeula DISCLAIMER: THIS IS NOT A TEXAS INSTRUMENT CALCULATOR, AND IS NOT SPONSORED IN ANYWAY BY TEXAS INSTRUMENT OR ANY OF ITS SUBSIDIARIES.

Screenshots

10BII Calc HD4 screens
RLM4 screens

Verdict

The call

The clearest difference is price: RLM at Free against 10BII Calc HD's $8.99. RLM also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (15.0 vs 17.6). 10BII Calc HD's advantage is in-app purchases (none vs 1) and ratings volume (3.7K vs 2). On rating, review sentiment, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

RLM is free to download; 10BII Calc HD costs $8.99 up front. RLM sells 1 one-off in-app purchase. 10BII Calc HD asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for 10BII Calc HD against 5.0 for RLM. That said, the two scores are not equally well evidenced: 10BII Calc HD has 3.7K ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 99% of 10BII Calc HD's written reviews are positive against 100% of RLM's.

UpkeepUpdate frequency

10BII Calc HD ships an update every 5 months, RLM every 2 months. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

Scorecard7 real differences · 4 level
10BII Calc HD versus RLM: the parameters behind the verdict, then further details
Parameter10BII Calc HDRLM
Price$8.99Free — better
Rating4.9 (3.7K ratings)5.0 (2 ratings) — better
Positive reviews98.8% of reviews100.0% of reviews — better
Number of ratings3.7K — better2
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
Best chart rank#26 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.0 — better
Further details — not scored
Size4 MB4 MB
Age rating4+4+
DeveloperErnest BrockR.L.M. Software

Customer experience

10BII Calc HD

All ratings3,729 ratings
Positive98.6%
Neutral0.8%
Negative0.6%
Written reviews745 reviews
Positive98.8%
Neutral0.3%
Negative0.9%

RLM

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

10BII Calc HD

Reported bugs

1 issue
  • Loan payment calculation issue after update

Requested features

2 requests
  • RPN mode
  • Canadian mortgage support

RLM

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

10BII Calc HD

No in-app purchases

1 purchases

RLM

One-time1
  • Lifetime Full Access$9.99

Questions

Is 10BII Calc HD free?
10BII Calc HD costs $8.99, with no in-app purchases.
Is RLM free?
RLM is free to download, with in-app purchases available.
Which has better reviews, 10BII Calc HD or RLM?
RLM is rated higher. 10BII Calc HD averages 4.9 out of 5 from 3.7K ratings, while RLM averages 5.0 from 2 ratings.
Do 10BII Calc HD or RLM have ads?
Neither 10BII Calc HD nor RLM shows ads.
Which is updated more often, 10BII Calc HD or RLM?
10BII Calc HD ships an update every 5 months, and RLM every 2 months. Most recently, 10BII Calc HD was updated on September 25, 2026 and RLM on September 10, 2026.

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