Comparison

Pentatronics 1000 vs RLM

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

Head to head
About

Pentatronics 1000

Experience a faithful re-creation of a legendary gaming calculator from a bygone era. This app brings back the iconic "READY" message and the novelty of having a game on a calculator, blending math with fun, style, and humor.

Highlights
  • Faithful re-creation of a legendary gaming calculator
  • Iconic "READY" message
  • Calculator with built-in games
  • Emphasis on fun, style, and humor
  • Brings a rare collectible to mobile
Features
Read full description

Pentatronics 1000 is a faithful re-creation of the legendary gaming calculator, one of the most exciting calculators of its era. Pentatronics 1000 introduced many novelties such as the iconic "READY" message that has been adopted by virtually every calculator ever since. Today we take for granted that a calculator should have at least one game, but this was again an innovation brought by Pentatronics. Pentatronics creators believed that life shouldn't be just about math and logic. Fun, style, and humor were every bit as important. Unfortunately, today these calculators are impossible to find except in the hands of a few lucky collectors. We are honored to bring this rare calculator to your mobile device. We would like to thank all the people who helped us during the development of this app, especially Edwin J. Gallaghan from the original Pentatronics 1000 development team. Without Edwin's expertise and warm encouragement, we couldn't have completed this project. For feedback, contact us at pentatronics1000@gmail.com.

About

RLM

This scientific calculator offers a comprehensive suite of tools for finance, business, statistics, and complex scientific calculations. It emulates a classic calculator while leveraging modern iOS device capabilities for ease of use and advanced functions.

Highlights
  • Finance and Business calculations
  • Date and Time interval calculations
  • Advanced Statistics and Curve Fitting
  • Complex Numbers and 3D Vectors
  • Unit and Currency Conversions
  • Equation Solver
  • Programmable functions
Features
Read full description

The RLM-10CX application is a general purpose calculator with a special focus in science and engineering. It is based in the Hewlett-Packard HP-10C calculator, 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. >Finance Menu: •Account Balance: Credit line type account based on cash transactions and interest rates applied. •Amortization: Loan Amortization Schedule for a single loan payment or from several payments at once. •Bond Price & Yield: Bonds calculations in an easy way with all options and values at sight. •Black-Scholes Options: CALL, PUT and “Greeks” calculations of the Black-Scholes European option valuation model. •Equal Periods: Calculations with Cash Flows occurring at regular time intervals. •Unequal Periods: Calculations with Cash Flows occurring at arbitrary dates. •Depreciation: Calculates depreciation with SL, SOYD, DB or MACRS methods and conventions. values at sight. •Interest Conversion: Nominal and effective interest conversion. •Time Value of Money: Compound Interest problems involving money earning interest over a period of time. >Business Menu: •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. Date / Time Menu: Calculates Date and Time intervals with all values at sight. >Statistics Menu: •One-Variable Statistics: Calculations for one variable data samples. •Two-Variable Statistics: Calculations for two variables data samples. •Curve Fitting: 6 Regression models to fit a curve based on two variables data samples. •Probability: Combinations, permutations, Normal, Exponential, t-Student and Weibull probability distributions. >Scientific Menu: •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. >Convert Menu: •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. >Program Menu: Create, edit or load previously saved programs. >Solver Menu: Solve arbitrary algebraic equations entered and saved in the equation editor and creates a menu with all the variables to solve any of them. >Utilities Menu: •General Settings: Customize the calculator to your preference. •Storage Registers: Store and perform operations directly over the calculator’s storage registers. •Memory Content: Shows all memory content edit, backup or restore. •Help Documents: learn by example about all menus. >Editors: submenu to select data editors. 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.

Screenshots

Pentatronics 10002 screens
RLM4 screens

Verdict

The call

The clearest difference is in-app purchases: Pentatronics 1000 at none against RLM's 1. Pentatronics 1000 also leads on ratings volume (4 vs 1) and iOS requirement (13.3 vs 15.0). On price, rating, update cadence and ads 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. Pentatronics 1000 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Pentatronics 1000 against 5.0 for RLM. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

Pentatronics 1000 ships an update fortnightly, RLM every 4 weeks. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Pentatronics 1000 versus RLM: the parameters behind the verdict, then further details
ParameterPentatronics 1000RLM
PriceFreeFree
Rating5.0 (4 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings4 — better1
Update frequencyFortnightly — betterEvery 4 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.3 — better15.0
Further details — not scored
Size1 MB6 MB
Age rating4+4+
DeveloperPaul NovaesR.L.M. Software

Customer experience

Pentatronics 1000

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

RLM

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Pentatronics 1000

No in-app purchases

1 purchases

RLM

One-time1
  • Lifetime Purchase$9.99

Questions

Is Pentatronics 1000 free?
Pentatronics 1000 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, Pentatronics 1000 or RLM?
Pentatronics 1000 and RLM are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do Pentatronics 1000 or RLM have ads?
Neither Pentatronics 1000 nor RLM shows ads.
Which is updated more often, Pentatronics 1000 or RLM?
Pentatronics 1000 ships an update fortnightly, and RLM every 4 weeks. Most recently, Pentatronics 1000 was updated on October 3, 2026 and RLM on September 30, 2026.

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