Comparison

CALC Smart Calculator ± vs CalcFast

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

Head to head
About

CALC Smart Calculator ±

This app offers a versatile calculator experience with basic, scientific, and advanced modes. It features real-time results, unit conversions, custom functions, and a shareable history. Optimized for various Apple devices, it's designed for ease of use by students, professionals, and scientists.

Highlights
  • Real-time results
  • Unit and currency conversions
  • Custom functions and constants
  • Shareable calculation history
  • Landscape mode with tape-roll
  • Gratuity calculator
Features
Read full description

Why Choose CALC Smart? ► Used by Scientists, Professionals and Students alike ► Apple-Featured: Spotlighted in Utilities and Calculate & Convert. ► User-Loved: Over 10k+ global reviews and 200M+ sessions validate its utility. ► Educator-Certified: Praised by teachers on the Educational App Store for its intuitive UI. Ready for the Latest OS * Multitask on your iPad and use 3D Touch shortcuts. * Search your calculation history with Spotlight. * Widget with history integration. * Apple Watch support, complete with haptic feedback and complications. Top 10 Unique Features ① Real-time results, even with incomplete parentheses. ② Landscape mode for shareable history and tape-roll. ③ Optimized custom keyboard & widget to save space and time. ④ Fast unit and currency conversions—a swipe away. ⑤ Quick gratuity calculator with rounding options. ⑥ Display decimals as fractions with 1/999 precision. ⑦ Create unlimited custom functions and constants. ⑧ Easy expression sharing via link. ⑨ Built-in timer. ⑩ Limitless themes and layouts. Why Users Love CALC * Live Math: Natural input, even for complex calculations. * Swipe Functions: Over 60 advanced math functions just a swipe away. * History: Never lose track of your calculations. * Conversion: 21 categories, plus custom options. Additional Features * Edit on the Fly: Long-press to modify expressions and numbers. * Audio Feedback: Customize tapping sounds. * Styling: Multiple font choices. * Enterprise-Ready: EMM support with MDM & AppConfig. We Listen * Frequent updates based on your feedback. Got a suggestion? Visit our UserVoice page: https://QApps.UserVoice.com Custom Background Tip * Design your own CALC background with images from NASA’s multimedia library: https://nasa.gov/multimedia Terms & Usage * Using this app means agreeing to the standard Terms of Use. Standard Terms of Use (EULA) - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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.

Screenshots

CALC Smart Calculator ±4 screens
CalcFast3 screens

Verdict

The call

The clearest difference is rating: CALC Smart Calculator ± at 4.8 against CalcFast's 4.2. CALC Smart Calculator ± also leads on ratings volume (2.4K vs 21) and update cadence (fortnightly vs every 2 months). CalcFast's advantage is in-app purchases (none vs 4). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CALC Smart Calculator ± sells 4 in-app purchases, starting at $0.99 per 3 months. CalcFast asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

CALC Smart Calculator ± holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: CALC Smart Calculator ± has 2.4K ratings behind it against 21, so its average is the more settled of the two. Written reviews point the same way: 87% of CALC Smart Calculator ±'s written reviews are positive against 78% of CalcFast's.

UpkeepUpdate frequency

CALC Smart Calculator ± ships an update fortnightly, CalcFast every 2 months. Both last shipped on November 1, 2026.

Scorecard8 real differences · 2 level
CALC Smart Calculator ± versus CalcFast: the parameters behind the verdict, then further details
ParameterCALC Smart Calculator ±CalcFast
PriceFreeFree
Rating4.8 (2.4K ratings) — better4.2 (21 ratings)
Positive reviews87.3% of reviews — better78.3% of reviews
Number of ratings2.4K — better21
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad
Requires iOS17.0 — better27.1
Further details — not scored
Size16 MB6 MB
Age rating4+4+
DeveloperQApps LLCHannes Sverrisson

Customer experience

CALC Smart Calculator ±

All ratings2,370 ratings
Positive96.7%
Neutral2.1%
Negative1.2%
Written reviews640 reviews
Positive87.3%
Neutral3.9%
Negative8.8%

CalcFast

All ratings21 ratings
Positive81.0%
Neutral0.0%
Negative19.0%
Written reviews23 reviews
Positive78.3%
Neutral4.3%
Negative17.4%

Bugs and requests

CALC Smart Calculator ±

Reported bugs

3 issues
  • Calculation errors in certain scenarios
  • Forced tutorial popup on every launch
  • Unreliable widget functionality

Requested features

4 requests
  • Ability to easily clear calculation history
  • Option to customize button layout
  • Support for entering hexadecimal numbers
  • Integration with other apps and services

CalcFast

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

CALC Smart Calculator ±

Subscriptions4
  • Quarterly Supporter$0.993 Months
  • Quarterly Supporter7 Days trial$1.993 Months
  • Annual Contributor$2.991 Year
Show 1 more
  • Annual Contributor7 Days trial$5.991 Year
None

CalcFast

No in-app purchases

Questions

Is CALC Smart Calculator ± free?
CALC Smart Calculator ± is free to download, with in-app purchases available.
Is CalcFast free?
CalcFast is free to download, with no in-app purchases.
Which has better reviews, CALC Smart Calculator ± or CalcFast?
CALC Smart Calculator ± is rated higher. CALC Smart Calculator ± averages 4.8 out of 5 from 2.4K ratings, while CalcFast averages 4.2 from 21 ratings.
Do CALC Smart Calculator ± or CalcFast have ads?
Neither CALC Smart Calculator ± nor CalcFast shows ads.
Which is updated more often, CALC Smart Calculator ± or CalcFast?
CALC Smart Calculator ± ships an update fortnightly, and CalcFast every 2 months. Most recently, CALC Smart Calculator ± was updated on November 1, 2026 and CalcFast on November 1, 2026.

Other comparisons