Comparison

Calc Pro HD vs Codex Calc

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

Head to head
About

Calc Pro HD

This app offers a comprehensive suite of 10 powerful calculators, including standard, scientific, graphing, and financial tools. It provides over 3000 unit conversions and daily currency updates, making it suitable for students and professionals alike for everyday calculations and complex financial tasks.

Highlights
  • 10 powerful calculators (Standard, Scientific, Graphing, Financial, etc.)
  • Over 3000 unit conversions in 18 categories
  • World currencies converter with daily updates
  • 10 financial worksheets (Mortgage, Loan, Tip, etc.)
  • Advanced graphing functions
  • Tape View for recent equations
  • Multiple display and calculator modes
Features
Read full description

***** THE TOP CALCULATOR FOR IPAD ***** 10 powerful calculators with 10 financial worksheets! You Will Never Need Another Calculator App Again With Calc Pro HD "4.5/5 Stars" - AppAdvice Take advantage of the improved workflow in either Landscape or Portrait! Calc Pro HD is the trusted choice by students and professionals around the world. The only calculator on the app store that can truly replace your pocket calculator. Calc Pro HD offers more power, more features, and more accuracy than any other mobile calculator. With 10 powerful calculators, 10 financial worksheets, Calc Pro HD truly has a calculator for every occasion. Whether you are checking the latest currency rates or converting simple cooking measurements, Calc Pro HD makes it easy to solve even the toughest calculations. ====================================== Features include: ====================================== 10 powerful calculators: • Standard Calculator • Scientific Calculator (includes RPN mode and access to constants) • Base Conversions • Graphing Calculator (8 equations, e-mail your equations and graph image. ) • Unit Converter (over 3000 conversions in 18 categories) • World Currencies Converter (150+ currencies updated daily) • Constants (contains over 1500 constants in mathematics, physics, the solar system and elements) • Financial Calculator (with 10 worksheets) • Statistics Calculator with 4 types of regression analysis and graphing • Date & Time Calculator (with lunar moon phases) The Financial Calculator contains 10 powerful calculator worksheets to help solve common financial problems. E-mail your worksheets. • Mortgage Calculator (with Amortization Tables) • Tip Calculator • Loan Calculator • Time Value Money worksheet • Financial Date worksheet • Percentage Change worksheet • Break Even worksheet • Profit Margin worksheet • Depreciation worksheet • Compound Interest worksheet Five display options: normal, scientific, fractions, engineering, and fixed (2-10 decimal places). Five calculator modes: simple, algebraic, direct algebraic, expression, and RPN. Choose from several skin styles and color schemes, full retina support! Advanced graphing functions: simultaneous graphs, find points on the graph and show tangents. E-mail your equations and graph image. Tape View displays your recent equations and allows you to copy or email them. Supported Languages: English, German, Spanish, Portuguese, French, Italian, Dutch, Japanese, Simplified & Traditional Chinese, Korean, and Russian. ====================================== Follow us on Twitter - @PanoramicSoft Like us on Facebook - Panoramicsoft

About

Codex Calc

This app offers a powerful yet intuitive calculator experience with a variety of modes including scientific, unit conversion, and tip calculation. It features a customizable interface and a detailed history tape for all your calculations.

Highlights
  • Full scientific calculator functions
  • Unit converter
  • Tip calculator
  • RPN mode
  • History tape
  • Customizable interface
  • Multiple visual themes
Features
Read full description

Codex Calc is the calculator for the rest of us: easy and intuitive, without sacrificing power and capabilities. Calculator • Unit Converter • Tip Calculator • RPN Mode • Full Scientific • History Tape All the power you need, wrapped in a beautifully designed interface that's simple without being simplistic. ADAPTS TO YOU Do you like big buttons, or small? Like minimalist interfaces, or are you a fan of bright and flashy? Prefer small fonts to see more detail, or big text and easy to read buttons? Codex Calc adapts itself to the way *you* like to work. FEATURES Everything you'd expect, plus: • History tape records all entries and calculations • Full suite of standard and scientific calculator functions • Unit conversion mode for forward and reverse conversions • Full tip calculator mode - taxes, tip, per-person amounts • RPN mode fully integrated • Rotation lock and sound on/off toggles • Seven different professionally designed visual themes • Multi-number memory and full set of memory-store operators • Full control over history tape font size • Single and multiple-line history tape formats • Large and small button sizes • Settings for customization (number formatting, behavior of clear key, display of calculation details, much more) Calculations: • Trig functions in degrees and radians • Log and power/exponentials • Scientific notation / exponent mode • Rounding and truncating • Random number generation • Parenthesis and sub-expressions ...and more! INTUITIVE TOUCH INTERFACE Take full advantage of your device's capabilities: • Overlays - rather than making buttons smaller to fit more, Codex Calc uses intuitive overlays on the existing buttons. • Popup Menus - hidden until you need them, pop-up context menus give you more power when the default action isn't quite what you need. • Zoomable History Tape - Tap the history tape to expand for more detail, change the font size, copy contents to clipboard, or forward as an email. View as single-lines to save space, or use multi-line view for more detail. • Multiple Flexible Layouts - Portrait and landscape, large and small buttons, and seven different graphical themes. • Easy-Touch Everything - Codex Calc's entire design approach revolves around "touch to activate." Tap the tape to see it bigger, swipe to scroll, long-press a button for more options, tap the display to copy or paste, etc.

Screenshots

Codex Calc4 screens

Verdict

The call

The clearest difference is rating: Calc Pro HD at 4.7 against Codex Calc's 4.0. Calc Pro HD also leads on ratings volume (283 vs 1) and update cadence (every 3 months vs every 6 months). Codex Calc's advantage is price ($0.99 vs $7.99) and review sentiment (100% vs 85%). On ads, in-app purchases and monetization model 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

Calc Pro HD costs $7.99 and Codex Calc $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calc Pro HD holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Calc Pro HD has 283 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 85% of Calc Pro HD's written reviews are positive against 100% of Codex Calc's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Calc Pro HD ships an update every 3 months, Codex Calc every 6 months. The most recent releases landed on July 4, 2026 and June 5, 2026 respectively.

Scorecard7 real differences · 3 level
Calc Pro HD versus Codex Calc: the parameters behind the verdict, then further details
ParameterCalc Pro HDCodex Calc
Price$7.99$0.99 — better
Rating4.7 (283 ratings) — better4.0 (1 ratings)
Positive reviews85.5% of reviews100.0% of reviews — better
Number of ratings283 — better1
Update frequencyEvery 3 months — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS9.0 — better12.0
Further details — not scored
Size50 MB11 MB
Age rating4+4+
DeveloperPanoramic Software Inc.Driftwood Studio Software LLC

Customer experience

Calc Pro HD

All ratings283 ratings
Positive96.1%
Neutral1.1%
Negative2.8%
Written reviews110 reviews
Positive85.5%
Neutral3.6%
Negative10.9%

Codex Calc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Calc Pro HD

Reported bugs

5 issues
  • Stopped working after being paid for
  • Crashes on iPad and iPhone, hasn't been updated in years
  • Broken with iPadOS 14.2
  • Tape not working
  • Decimals won't work properly

Requested features

3 requests
  • Add option to put the tape on either the right or left side in landscape orientation
  • Include a help button showing how to use the functions
  • Add a dark mode option

Codex Calc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Calc Pro HD

No in-app purchases

None

Codex Calc

No in-app purchases

Questions

Is Calc Pro HD free?
Calc Pro HD costs $7.99, with no in-app purchases.
Is Codex Calc free?
Codex Calc costs $0.99, with no in-app purchases.
Which has better reviews, Calc Pro HD or Codex Calc?
Calc Pro HD is rated higher. Calc Pro HD averages 4.7 out of 5 from 283 ratings, while Codex Calc averages 4.0 from 1 ratings.
Do Calc Pro HD or Codex Calc have ads?
Neither Calc Pro HD nor Codex Calc shows ads.
Which is updated more often, Calc Pro HD or Codex Calc?
Calc Pro HD ships an update every 3 months, and Codex Calc every 6 months. Most recently, Calc Pro HD was updated on July 4, 2026 and Codex Calc on June 5, 2026.

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