Comparison

Compounder vs RLM

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

Head to head
About

Compounder

Calculate the growth of savings and investments using compound interest. Explore how regular contributions and withdrawals impact your financial goals over time. Designed for anyone to understand and utilize the power of compounding for wealth building.

Highlights
  • Calculate compound interest
  • Flexible settings
  • Factor in periodic withdrawals
  • Factor in additional contributions
  • Easy-to-use interface
Features
Read full description

Compounder lets you easily calculate the power of compound interest to reach your financial goals—whether for savings, investments, or retirement planning. What is compound interest? Compound interest is the interest calculated on both the initial principal and the accumulated interest from previous periods. This powerful tool can make a big difference over time! Example: Imagine starting with $1,000 in savings, contributing $500 monthly at an 11% annual return. After 40 years, that account could grow to $4.38 million! Even small, regular contributions—like the average American car payment—can build lasting wealth. Features: Quickly calculate compound interest with flexible settings. Factor in periodic withdrawals or additional contributions to see how they affect your growth. Easy-to-use interface, designed for anyone wanting to understand and harness compound interest, without needing a finance background. You don’t need to be a Wall Street broker to become a millionaire. Start planning your financial future with Compounder today!

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

Compounder3 screens
RLM4 screens

Verdict

The call

The clearest difference is review sentiment: RLM at 100% against Compounder's 61%. RLM also leads on rating (5.0 vs 4.8). Compounder's advantage is in-app purchases (none vs 1) and ratings volume (3.4K vs 2). On price, ads, monetization model 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

Both are free to download. RLM sells 1 one-off in-app purchase. Compounder asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RLM holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Compounder has 3.4K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 61% of Compounder's written reviews are positive against 100% of RLM's.

UpkeepUpdate frequency

Compounder ships an update every 3 weeks, RLM every 2 months. The most recent releases landed on October 17, 2026 and September 30, 2026 respectively.

Scorecard5 real differences · 5 level
Compounder versus RLM: the parameters behind the verdict, then further details
ParameterCompounderRLM
PriceFreeFree
Rating4.8 (3.4K ratings)5.0 (2 ratings) — better
Positive reviews61.4% of reviews100.0% of reviews — better
Number of ratings3.4K — better2
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size3 MB4 MB
Age rating4+4+
DeveloperJames BevinsR.L.M. Software

Customer experience

Compounder

All ratings3,438 ratings
Positive96.5%
Neutral1.7%
Negative1.8%
Written reviews57 reviews
Positive61.4%
Neutral12.3%
Negative26.3%

RLM

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

Bugs and requests

Compounder

Reported bugs

3 issues
  • Calculation issues with initial investment
  • Formatting issues on mobile devices
  • Crashes after short usage

Requested features

5 requests
  • Add percentage option for withdrawal
  • Allow adjusting periodic contributions (weekly, monthly, etc.)
  • Include daily compounding option
  • Add inflation adjustment to contributions and outputs
  • Create a widget version

RLM

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Compounder

No in-app purchases

1 purchases

RLM

One-time1
  • Lifetime Full Access$9.99

Questions

Is Compounder free?
Compounder is free to download, with no in-app purchases.
Is RLM free?
RLM is free to download, with in-app purchases available.
Which has better reviews, Compounder or RLM?
RLM is rated higher. Compounder averages 4.8 out of 5 from 3.4K ratings, while RLM averages 5.0 from 2 ratings.
Do Compounder or RLM have ads?
Neither Compounder nor RLM shows ads.
Which is updated more often, Compounder or RLM?
Compounder ships an update every 3 weeks, and RLM every 2 months. Most recently, Compounder was updated on October 17, 2026 and RLM on September 30, 2026.

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