Comparison

RLM vs Citizen Calculator ⁺

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

Head to head
About

RLM

This app simulates a powerful financial calculator, offering extensive tools for business, finance, statistics, and scientific calculations. It provides worksheets for loan amortization, bond pricing, currency exchange, and more, all within an intuitive interface designed for iOS devices.

Highlights
  • 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
Features
Read full description

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.

About

Citizen Calculator ⁺

This app emulates a CITIZEN calculator, perfect for everyday and business math. It handles basic operations, corrections, percentages, constants, and large numbers, displaying them in scientific notation when needed.

Highlights
  • Basic math operations
  • Check and correct functionality
  • Auto replay
  • Percent calculation
  • Constants calculation
  • Number formatting
  • Grand total (GT)
Features
Read full description

This app is a fully working emulator of CITIZEN calculator. This calculator is ideal for general and business purposes. Calculator Features:- * Basic math operations (addition, subtraction, multiplication, division) * Check and correct * Auto replay * Percent calculation * Constants calculation * Number formatting (Decimal and digit-grouping) as per device locale * Grand total (GT) You can use this calculator to work with very large numbers. Numbers having more than 12 digits are shown in scientific notation. Leave a review if you like this simple and easy to use calculator app. For any suggestions/queries/problems in the app? Write to us at rakeshapp4@gmail.com

Screenshots

RLM4 screens
Citizen Calculator ⁺4 screens

Verdict

The call

The clearest difference is in-app purchases: Citizen Calculator ⁺ at none against RLM's 4. RLM's advantage is ads (none vs shown) and update cadence (every 2 months vs every 12 months). On price, device support and iOS requirement 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 4 in-app purchases, starting at $0.49 per month. Citizen Calculator ⁺ asks for nothing beyond the download.

UpkeepUpdate frequency

RLM ships an update every 2 months, Citizen Calculator ⁺ every 12 months. Both last shipped on November 3, 2026.

Scorecard4 real differences · 6 level
RLM versus Citizen Calculator ⁺: the parameters behind the verdict, then further details
ParameterRLMCitizen Calculator ⁺
PriceFreeFree
Rating—4.2 (5 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings—5 — better
Update frequencyEvery 2 months — betterEvery 12 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size7 MB6 MB
Age rating4+4+
DeveloperR.L.M. SoftwareRakesh Bhadani

Customer experience

RLM

Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Citizen Calculator ⁺

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

4 purchases

RLM

Subscriptions3
  • Monthly Subscription$0.491 Month
  • Semi-Annual Subscription$2.996 Months
  • Annual Subscription$5.991 Year
One-time1
  • Lifetime Purchase$9.99
None

Citizen Calculator ⁺

No in-app purchases

Questions

Is RLM free?
RLM is free to download, with in-app purchases available.
Is Citizen Calculator ⁺ free?
Citizen Calculator ⁺ is free to download, with no in-app purchases.
Do RLM or Citizen Calculator ⁺ have ads?
Citizen Calculator ⁺ shows ads; RLM does not.
Which is updated more often, RLM or Citizen Calculator ⁺?
RLM ships an update every 2 months, and Citizen Calculator ⁺ every 12 months. Most recently, RLM was updated on November 3, 2026 and Citizen Calculator ⁺ on November 3, 2026.

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