Calc Pro HD vs Duodecuple Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calc Pro HD
This app offers a comprehensive suite of 10 powerful calculators and 10 financial worksheets, designed to replace your physical calculator. It includes scientific, graphing, unit conversion, and financial tools, catering to students and professionals for a wide range of calculations.
- 10 powerful calculators
- 10 financial worksheets
- Scientific calculator with RPN
- Graphing calculator
- Unit converter (3000+ conversions)
- World currencies converter
- Date & Time calculator
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***** THE TOP CALCULATOR FOR IPAD ***** Calc Pro HD combines 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 ten (10) powerful calculators, ten (10) financial and eight (8) statistical 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
Duodecuple Calc
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Display 12 calculators and perform calculations with each one.
Screenshots
Verdict
The clearest difference is in-app purchases: Duodecuple Calc at none against Calc Pro HD's 10. Duodecuple Calc also leads on update cadence (every 2 weeks vs every 3 months) and device support (3 vs 1). Calc Pro HD's advantage is iOS requirement (9.0 vs 15.8.3). On price 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
Both are free to download. Calc Pro HD sells 10 one-off in-app purchases. Duodecuple Calc asks for nothing beyond the download.
Calc Pro HD ships an update every 3 months, Duodecuple Calc every 2 weeks. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.
| Parameter | Calc Pro HD | Duodecuple Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.4K ratings) — better | — |
| Positive reviews | 88.8% of reviews | — |
| Number of ratings | 1.4K — better | — |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 15.8.3 |
| Further details — not scored | ||
| Size | 59 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | Panoramic Software Inc. | Hideaki Uchikoshi |
Bugs and requests
Calc Pro HD
Reported bugs
2 issues- Crashes on iOS 14.3
- Currency converter not updating
Requested features
4 requests- Bluetooth keyboard support
- Statistical functions
- Landscape mode on iPad
- Improved date/time calculator
Duodecuple Calc
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calc Pro HD
- Base Conversions$0.99
- Date & Time Calculator$0.99
- Design Pack$0.99
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- Graphing Calculator$0.99
- Statistics Calculator$0.99
- World Currencies$0.99
- Constants$1.99
- Financial Calculator$1.99
- Unit Converter$1.99
- Full Version$7.99
Duodecuple Calc
No in-app purchases









