Comparison

CalcFast vs NDK QR Scanner

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

Head to head
About

CalcFast

A fast and elegant calculator for Apple devices that displays your calculation history. It offers a Today Extension for quick access and supports Apple Watch, external keyboards, and VoiceOver.

Highlights
  • Calculation history display
  • Today Extension for quick calculations
  • Apple Watch app
  • Dark/light mode selection
  • External keyboard support
  • VoiceOver support
Features
Read full description

Fast and simple calculator for iPad, iPhone and Apple Watch that shows the calculation history, includes a Today Extension that allows for fast calculation by swiping down and 3D Touch for quick interactions. Numbers are formatted for your country, i.e. period in the US and comma in Europe. Ever lost your train of thought half way through a calculation and thought how handy it would be to review your calculations. The aim of this Calculator is to be fast, elegant and simple. Features: - The calculator can open side by side or over other apps in iPadOS. - Select dark or light mode. - External keyboard support. - Smart Apple Watch Calculator included. - Light weight Today Extension included. - Calculations shown when input and on tape. - Key click confirms pressing of buttons, which may be turned off. - Previous calculation is repeated when the equal sign is pressed. - Numbers are shown in local format, depending on your Region Formats, i.e. comma used in Europe. The number of decimal digits may be set in the Settings. - VoiceOver is supported. - Calculations Tape may be deleted by Tapping on it.

About

NDK QR Scanner

Features
Read full description

Scan smarter. NDK QR Scanner is the fast, private way to read and create QR codes and barcodes — and it works fully offline. No account, no ads, no tracking. Point your camera at any code and it’s detected instantly, with a beep and a vibration. Then get the exact action for what you scanned: open a link, join a Wi-Fi network, call a number, send a message, or find a place on the map. WHY YOU’LL LOVE IT • Lightning-fast detection, even in low light (auto-focus + auto-zoom) • 100% offline — your scans never leave your device • Clean Material design with Light & Dark mode • No ads, no sign-up, no data collection SCAN EVERYTHING • QR Codes, Data Matrix, Aztec, PDF417 • Barcodes: Code 128 / 39 / 93, Codabar, EAN-13, EAN-8, UPC-A, UPC-E, ITF • Scan live with the camera OR from a photo in your gallery • Flashlight, front/back camera switch, continuous scan mode SMART RESULTS The app understands what you scanned and shows the right buttons: • Website → open in browser • Wi-Fi → view network name & password • Phone → call or text • Email → compose a message • Location → open in Maps • Text → copy, share, or search Copy, share, or save any result in one tap. HISTORY & FAVORITES • Every scan saved automatically (you can turn it off) • Search your history and star favorites • Swipe to delete, clear all, or export as text CREATE QR CODES • Generate a QR code from any text or link • Save it as an image or share it anywhere MADE FOR YOU • Works on iPhone and iPad • 8 languages: English, हिन्दी, Português, Bahasa Melayu, Tiếng Việt, 日本語, 한국어, Deutsch • Sound, vibration, auto-open links, and more — all in your control PRIVATE BY DESIGN NDK QR Scanner runs entirely on your device. The camera is used only to detect codes — nothing is recorded or uploaded. No analytics. No third parties. Ever. Download NDK QR Scanner — fast, private, and made to just work.

Screenshots

CalcFast3 screens
NDK QR Scanner4 screens

Verdict

The call

The clearest difference is iOS requirement: NDK QR Scanner at 13.0 against CalcFast's 27.1. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 9 level
CalcFast versus NDK QR Scanner: the parameters behind the verdict, then further details
ParameterCalcFastNDK QR Scanner
PriceFreeFree
Rating4.2 (21 ratings) — better—
Positive reviews78.3% of reviews—
Number of ratings21 — better—
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS27.113.0 — better
Further details — not scored
Size6 MB24 MB
Age rating4+4+
DeveloperHannes SverrissonNguyen Dinh Khoa

In-app purchases

None

CalcFast

No in-app purchases

None

NDK QR Scanner

No in-app purchases

Questions

Is CalcFast free?
CalcFast is free to download, with no in-app purchases.
Is NDK QR Scanner free?
NDK QR Scanner is free to download, with no in-app purchases.
Do CalcFast or NDK QR Scanner have ads?
Neither CalcFast nor NDK QR Scanner shows ads.

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