Comparison

RedCrab Calculator vs Duodecuple Calc

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

Head to head
About

RedCrab Calculator

Features
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The RedCrab Calculator is an efficient and powerful tool designed for students, engineers, professionals, and everyday users. Whether you're handling simple daily expenses or complex engineering algebra, it provides a precise and lightning-fast calculation experience. Combining an elegant modern UI with a robust calculation engine, every tap is a seamless experience. Key Features: - Basic & Advanced Calculations : Flawlessly supports basic arithmetic alongside advanced scientific functions including trigonometry (sin, cos, tan), logarithms (log, ln), exponents (^), roots (ⁿ√x), and modulo (%). - Smart Expression Parsing : Supports nested parentheses and long expression inputs. It strictly follows mathematical order of operations, displaying exactly what you calculate to ensure accuracy in complex equations. - History & Result Reuse : Automatically saves your calculation history. The dedicated "Ans" button allows you to instantly recall your last answer, making multi-step calculations a breeze. - High-Precision Display : Optimized large number display logic supports showing more significant digits, eliminating the frustration of forced and hard-to-read scientific notation. - Dark Mode & Modern UI : Native support for Dark Mode to protect your eyes. Carefully tuned button layouts, smooth highlight touch feedback, and dynamic font scaling deliver an ultimate user experience. - VIP Privileges : Unlock VIP membership to enjoy a pure, ad-free, immersive calculation experience, along with access to exclusive premium features. Scientific Calculator: Making numbers clearer and calculations smarter.

About

Duodecuple Calc

Features
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Display 12 calculators and perform calculations with each one.

Screenshots

RedCrab Calculator4 screens
Duodecuple Calc1 screens

Verdict

The call

The clearest difference is in-app purchases: Duodecuple Calc at none against RedCrab Calculator's 1. On price, update cadence, ads 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. RedCrab Calculator sells 1 one-off in-app purchase. Duodecuple Calc asks for nothing beyond the download.

UpkeepUpdate frequency

RedCrab Calculator ships an update fortnightly, Duodecuple Calc every 2 weeks. The most recent releases landed on August 30, 2026 and August 3, 2026 respectively.

Scorecard1 real difference · 5 level
RedCrab Calculator versus Duodecuple Calc: the parameters behind the verdict, then further details
ParameterRedCrab CalculatorDuodecuple Calc
PriceFreeFree
Update frequencyFortnightlyEvery 2 weeks — better
AdsYesYes
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.6 — better15.8.3
Further details — not scored
Size4 MB36 MB
Age rating4+4+
Developer少泽 梁Hideaki Uchikoshi

In-app purchases

1 purchases

RedCrab Calculator

One-time1
  • 终身会员$1.99
None

Duodecuple Calc

No in-app purchases

Questions

Is RedCrab Calculator free?
RedCrab Calculator is free to download, with in-app purchases available.
Is Duodecuple Calc free?
Duodecuple Calc is free to download, with no in-app purchases.
Do RedCrab Calculator or Duodecuple Calc have ads?
Both RedCrab Calculator and Duodecuple Calc show ads.
Which is updated more often, RedCrab Calculator or Duodecuple Calc?
RedCrab Calculator ships an update fortnightly, and Duodecuple Calc every 2 weeks. Most recently, RedCrab Calculator was updated on August 30, 2026 and Duodecuple Calc on August 3, 2026.

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