Comparison

PdfX vs RLM

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

Head to head
About

PdfX

Easily convert PDF files to various formats, edit pages, merge documents, and split PDFs. This tool requires no technical knowledge to manage all your PDF needs.

Highlights
  • Convert PDF to 5 formats
  • Edit PDF pages
  • Merge PDF files
  • Split PDF into documents
  • Rotate pages up to 360 degrees
  • Supports Word, JPG, PNG, HTML, TXT
Features
Read full description

PdfX.app is a new app, that allows you to convert PDF into a variety of formats, edit PDF, split PDF, combine PDF and much more! You can upload any document in PDF format, no technical knowledge is needed, and the website will automatically convert it's content into the format you desire. Plus, you can edit the PDF pages, rotate them, split them, combine it with other and more! Packaged with features, to manager every PDF management need: -> Merge with another PDF file at any page point. -> Split into several documents, with no problem -> Rotate up to 360 degrees any page -> Convert from and to up to 5 different formats -> Supporting Microsoft Word, JPG, PNG, HTML, TXT conversion formats Convert and edit your PDF, for FREE, NOW!

About

RLM

This app offers a comprehensive suite of calculators for finance, business, science, and general use. It includes specialized worksheets for loans, investments, statistics, and complex mathematical functions, designed to leverage iOS device capabilities.

Highlights
  • Finance worksheets (amortization, bond pricing, options)
  • Business calculations (bill split, break-even, currency)
  • Statistical analysis (probability, regressions)
  • Scientific functions (complex numbers, vectors)
  • Unit and currency conversions
  • Equation solver
  • Date and time calculations
Features
Read full description

The RLM-17BX is a calculator for finance, business and science. It is designed to bring up the most of your iOS devices with an extensive set of worksheets and enhancements to cover most of the functions generally needed by financial, business, mathematical, engineering and scientific professionals. >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. •Interest Rates: Nominal and effective interest conversion. •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 manual or on-line rates. •Inventory Turn Over. •Percents & Margins: Calculates %Change, %Total and Business margins. •Return on Investment. >Cash Flows Worksheets: •Equal Periods: Cash Flows occurring at regular time intervals. •Unequal Periods: Cash Flows occurring at arbitrary dates. >Statistics Worksheets: •Probability: 16 probability distributions. •One or Two variables Statistics. •Curve Fitting: 6 Regression models to fit a curve. >Scientific Worksheets: •Angles & Polar-Rectangular conversions. •Complex Numbers: Operations and functions with complex numbers. •Combinations & Permutations. •Logarithms, Trigonometric, Hyperbolic and Number Alteration functions. •Quadratic Equation solver •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. >Conversion Worksheets: •Angles: Convert angle between DEG,RAD,GRAD,DMS and Slope %. •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. •General Settings to set classic and new keyboard skins, RPN and algebraic logic, sounds, display format, etc. >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 26.0 or above. 30-day free trial, then a single one-time Lifetime Purchase. No subscription. 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

PdfX4 screens
RLM4 screens

Verdict

The call

The clearest difference is rating: RLM at 5.0 against PdfX's 2.0. RLM also leads on ads (none vs shown). PdfX's advantage is in-app purchases (none vs 4) and update cadence (every 2 weeks vs monthly). On price 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 4 in-app purchases, starting at $0.49 per month. PdfX asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RLM holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

PdfX ships an update every 2 weeks, RLM monthly. Both last shipped on October 24, 2026.

Scorecard7 real differences · 3 level
PdfX versus RLM: the parameters behind the verdict, then further details
ParameterPdfXRLM
PriceFreeFree
Rating2.0 (4 ratings)5.0 (1 ratings) — better
Positive reviews—53.3% of reviews
Number of ratings4 — better1
Update frequencyEvery 2 weeks — betterMonthly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better26.0
Further details — not scored
Size38 MB7 MB
Age rating4+4+
DeveloperIpsilon Developments IncR.L.M. Software

Customer experience

PdfX

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%

RLM

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews15 reviews
Positive53.3%
Neutral20.0%
Negative26.7%

In-app purchases

None

PdfX

No in-app purchases

4 purchases

RLM

Subscriptions3
  • Monthly Virtual Battery$0.491 Month
  • Semi-Annual Subscription$2.996 Months
  • Annual Subscription$5.991 Year
One-time1
  • Lifetime Purchase$9.99

Questions

Is PdfX free?
PdfX 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, PdfX or RLM?
RLM is rated higher. PdfX averages 2.0 out of 5 from 4 ratings, while RLM averages 5.0 from 1 ratings.
Do PdfX or RLM have ads?
PdfX shows ads; RLM does not.
Which is updated more often, PdfX or RLM?
PdfX ships an update every 2 weeks, and RLM monthly. Most recently, PdfX was updated on October 24, 2026 and RLM on October 24, 2026.

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