# CALC Smart Calculator ± vs CalcFast

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.

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.

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.

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

## The numbers

| Metric | CALC Smart Calculator ± | CalcFast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.4K ratings)](https://appshunter.io/ios/app/calc-smart-calculator/id576675190/reviews)** | [4.2 (21 ratings)](https://appshunter.io/ios/app/calcfast/id876781417/reviews) |
| Number of ratings | **2.4K** | 21 |
| Positive reviews | **87.3% of reviews** | 78.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 16 MB | 6 MB |
| Requires iOS | **17.0** | 27.1 |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [QApps LLC](https://appshunter.io/developer/395652397) | [Hannes Sverrisson](https://appshunter.io/developer/428851947) |

## What reviewers say

### CALC Smart Calculator ±

[App page](https://appshunter.io/ios/app/calc-smart-calculator/id576675190)

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:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quarterly Supporter | $0.99 | per 3 months |
| Quarterly Supporter | $1.99 | per 3 months |
| Annual Contributor | $2.99 | per year |
| Annual Contributor | $5.99 | per year |

**What reviewers like**

- 💻 Excellent calculator functionality
- 🎨 Beautiful and clean interface
- 🔢 Displays full calculation history
- 🔍 Useful conversion tools
- 🤖 Seamless Apple Watch integration

**What reviewers complain about**

- 💰 Subscription model introduced
- 🔒 Restricted features behind paywall
- 📊 Calculation bugs and inaccuracies
- 🔄 Unnecessary UI changes frustrate users

**Reported bugs**

- Calculation errors in certain scenarios
- Forced tutorial popup on every launch
- Unreliable widget functionality

**Requested features**

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


### CalcFast

[App page](https://appshunter.io/ios/app/calcfast/id876781417)

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:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*