Comparison

QuickScan Pro vs CalcKing Pro

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

Head to head
About

QuickScan Pro

Features
Read full description

Main features Fast scanning: Read QR codes instantly with one touch. Supports a variety of QR codes: Supports various types of QR codes, including URLs, text, contact information, and Wi-Fi connection information. History management: Scanned QR codes are automatically saved for easy access at any time. Share function: Scanned results can be shared on social media or by email. Safety and security: You can check the contents of the QR code before scanning, preventing phishing and access to fraudulent sites. How to use Launch the app. Simply point the camera at the QR code and the scan will start automatically. The scan results will be displayed, and you can check the details or share them. Recommended points Simple design: Adopts an intuitive and easy-to-use interface. High-precision recognition ability: Equipped with the latest image processing technology, it recognizes QR codes with high accuracy. Privacy protection: No data obtained within the app will be transmitted to the outside. Download QuickScan Pro and make your life more convenient and smarter! Supported devices: iPhone and iPad running iOS 12.0 or later. Price: Free (with ads). Experience a new era of QR code scanning with QuickScan Pro!

About

CalcKing Pro

Features
Read full description

Professional engineering calculator, the mobile computing tool for engineers! No ad interference: Specifically designed for engineers, with a pure usage experience and no pop-up ads. Full coverage of core functions: Basic scientific calculations: Trigonometric functions, logarithms and exponents, power operations, constant calls (π/e, etc.), support for degree/radian conversion, meeting general calculation needs. 12 types of unit conversions: Length, weight, area, volume, temperature, speed, etc., covering meters/cm/inches, kilograms/pounds, etc. Common sub-units, one-click quick conversion. Base conversion: Supports binary, octal, decimal, and hexadecimal conversions, suitable for electronic/computer engineering scenarios. Specialized engineering calculations: Built-in mechanics, circuits, materials, etc. Modules, solving professional problems such as force on inclined planes, series resistors, etc. User-friendly design: Portrait operation: Compatible with iPhone, using the vertical screen in engineering scenarios is more convenient. Local saved calculation history: Automatically records the last 20 calculations, not lost when uninstalling, and can be recalled at any time. Precise adaptation: Optimized for on-site work by engineers, clear display of large numbers, real-time input verification to avoid errors. Efficient work, time and effort-saving: From basic formulas to complex engineering problems, all are covered, helping you focus on core work!

Screenshots

QuickScan Pro4 screens
CalcKing Pro4 screens

Verdict

The call

The clearest difference is ads: CalcKing Pro at none against QuickScan Pro's shown. QuickScan Pro's advantage is update cadence (every 3 days vs weekly). On price, in-app purchases, 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. QuickScan Pro sells 1 in-app purchase, starting at $0.99 per month and CalcKing Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

QuickScan Pro ships an update every 3 days, CalcKing Pro weekly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level
QuickScan Pro versus CalcKing Pro: the parameters behind the verdict, then further details
ParameterQuickScan ProCalcKing Pro
PriceFreeFree
Update frequencyEvery 3 days — betterWeekly
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size15 MB2 MB
Age rating4+4+
DeveloperMoca LLC文娟 唐

In-app purchases

1 purchases

QuickScan Pro

Subscriptions1
  • Pro$0.991 Month
1 purchases

CalcKing Pro

One-time1
  • 解锁功能$3.99

Questions

Is QuickScan Pro free?
QuickScan Pro is free to download, with in-app purchases available.
Is CalcKing Pro free?
CalcKing Pro is free to download, with in-app purchases available.
Do QuickScan Pro or CalcKing Pro have ads?
QuickScan Pro shows ads; CalcKing Pro does not.
Which is updated more often, QuickScan Pro or CalcKing Pro?
QuickScan Pro ships an update every 3 days, and CalcKing Pro weekly. Most recently, QuickScan Pro was updated on October 27, 2026 and CalcKing Pro on October 25, 2026.

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