# CALC Smart Calculator ± — Basic « Scientific » Advanced

> Versatile calculator with scientific, advanced modes, and real-time results. (iPhone/iPad app by QApps LLC.)

- Source: https://appshunter.io/ios/app/calc-smart-calculator/id576675190 (this page in markdown: same URL + `.md`)
- Developer: [QApps LLC](https://appshunter.io/developer/395652397)
- Category: Utilities, Productivity
- Price: Free with in-app purchases (on sale, was $5.99)
- Rating: 4.80/5 from 2,365 App Store ratings · 618 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.5 · 16 MB
- Languages: Russian, Welsh, American English, European Spanish, Italian, German (Germany), Polish, European Portuguese, Slovak, Thai and 4 more
- Released: 2012-11-21
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/calc-smart-calculator/id576675190/reviews.md

## What is CALC Smart Calculator ±?

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/

## Key features

- Real-time results
- Unit and currency conversions
- Custom functions and constants
- Shareable calculation history
- Landscape mode with tape-roll
- Gratuity calculator

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

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


## What do users think of CALC Smart Calculator ±?

Overall sentiment: negative

**Pros**

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

**Cons**

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

**Commonly reported bugs**

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

**Most requested features**

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

## Recent user reviews (10 of 618)

All indexed reviews: https://appshunter.io/ios/app/calc-smart-calculator/id576675190/reviews.md

### 4/5 — 🪉🎺🥁

*2026-08-23*

Где громкость!?

**Developer response:** You mean like Bel vs Neper?

### 1/5 — НЕВОЗМОЖНО ПОЛЬЗОВАТЬСЯ!

*2026-04-24*

Каждый раз при нажатии на равно, на «С» и тд вылазит предложение оформить платную подписку! НЕВОЗМОЖНО ПОЛЬЗОВАТЬСЯ КАЛЬКУЛЯТОРОМ!

**Developer response:** Бесплатно только для пробного использования. После подписки будут доступны все функции.

### 3/5 — Gets in its own way

*2026-01-27, version 3.7.7*

A calculator should just be a calculator. That is what this was for about 10 years. Unfortunately now every few times I use the app and just want to do a quick calculation I get a prompt about why I should upgrade to the new premium plan or something. I don’t agree with the new monetisation strategy for this app (I will pay a one off premium price, but I will not subscribe to a calculator), but I appreciate the developer is not forcing long-time customers to upgrade. However, everything is geared towards encouraging you to do that. For that reason, and because I’ve never really liked the interface, I will be moving on.

### 4/5 — One time purchase now requires a subscription

*2026-01-22*

I purchased this calculator and have enjoyed it for years. It was advertised as one-time purchase. Now with the latest version it is popping up a subscription authorization screen every time I press the equals button asking for a subscription. It has also disabled a lot of the unit conversion functionality. You can’t offer a product as a one time purchase and then years later after the sale come back requiring me to pay you more money. If this is not resolved soon I will delete the app and never purchase anything else from this developer.

UPDATE: this has been fixed and is no longer requesting a subscription. Thanks for fixing this.  I will update my review.

**Developer response:** This was an error on our part, legacy user were never supposed to be required to subscribe. It should be all fixed now since v3.7.3. You can always reach us via UserVoice in the app or support@qapps.com if you have any issues or suggestions. Thanks!

### 1/5 — несмотря на то что купил приложение раньше требует подписку

*2026-01-01*

периодически требует подписку несмотря на то что ранее купил это приложение. Сделайте отдельную версию с подпиской и оставьте в покое тех кто поддержал Вас купив это приложение!!!!

### 1/5 — Full of annoying popups now

*2025-12-24, version 3.7.6*

After recent update there are CONSTANT popups reminding you to give the devs money for a calculator even AFTER you bought it. They made the widget super laggy too, it just gets worse and worse with every update.

### 1/5 — Всплывающая реклама

*2025-11-06*

Теперь каждый раз, когда я нажимаю равно ,у меня вылазит предложение о подписке , мне нравился этот калькулятор , но если это не изменится , придется удалить приложение…

**Developer response:** Это была наша ошибка — от постоянных пользователей никогда не требовалось оформлять подписку. Начиная с версии 3.7.3, всё должно быть исправлено. Если у вас возникнут какие-либо проблемы или предложения, вы всегда можете связаться с нами через UserVoice в приложении или по адресу support@qapps.com. Спасибо!

### 1/5 — Subscription

*2025-11-06, version 3.7.2*

Used it for a long time until they required a subscription from me today. Pass.

### 1/5 — One time purchase now requires a subscription

*2025-11-06*

I purchased this calculator and have enjoyed it for years. It was advertised as one-time purchase. Now with the latest version it is popping up a subscription authorization screen every time I press the equals button asking for a subscription. It has also disabled a lot of the unit conversion functionality. You can’t offer a product as a one time purchase and then years later after the sale come back requiring me to pay you more money. If this is not resolved soon I will delete the app and never purchase anything else from this developer.

**Developer response:** This was an error on our part, legacy user were never supposed to be required to subscribe. It should be all fixed now since v3.7.3. You can always reach us via UserVoice in the app or support@qapps.com if you have any issues or suggestions. Thanks!

### 1/5 — Subscription

*2025-11-05*

I bought this app years ago when there was no Apple calculator app on the iPad. Now all of a sudden CALC Smart Calculator wants to charge me a subscription fee. For what? It doesn’t do anything better since I bought it. And it doesn’t do anything that the Apple Calculator does already. Total Ripp-Off! I’ll just delete it from my iPad.

**Developer response:** It shouldn’t be asking you as a long time user - did you try to restart? Sorry you feel the way, there are lot of advantages over other calculators and plenty of changes over the years. You can always reach out via Help in the app to resolve any issues you have including the one you are experiencing, we can’t help you here. Thanks 🙏

## Frequently asked questions about CALC Smart Calculator ±

### What does CALC Smart Calculator do?

CALC Smart Calculator provides a comprehensive calculator experience with basic, scientific, and advanced modes. It offers real-time results, unit and currency conversions, custom functions, and a shareable history, making it suitable for a wide range of users.

### What are the key features of this calculator app?

Key features include real-time results even with incomplete parentheses, landscape mode for a shareable history tape, fast unit and currency conversions, a gratuity calculator, the ability to display decimals as fractions, and the creation of unlimited custom functions and constants.

### Is CALC Smart Calculator free to use?

The app is free to download and use, offering a robust set of features. It also includes in-app purchases, which may unlock additional functionalities or customization options for users who require them.

### What devices is CALC Smart Calculator compatible with?

This calculator is optimized for the latest OS and supports multitasking on iPad, 3D Touch shortcuts, Spotlight search for history, widgets with history integration, and Apple Watch with haptic feedback and complications.

### Who would benefit from using CALC Smart Calculator?

The app is designed for scientists, professionals, and students alike. Its intuitive UI and advanced features make it ideal for anyone who needs a reliable and powerful tool for calculations, conversions, and mathematical tasks.

## Version history (last 5 releases)

### 3.8.1 — 2026-08-22

Fixed issue on the widget for the decimal point in different locales.
All new custom keyboard synced with your theme design.

### 3.8.0 — 2026-06-25

All new widget with theme matching support.

### 3.7.9 — 2026-06-12

Just a few tweaks, oh and 4.0 sneak peek!

### 3.7.8 — 2026-02-03

Just a few tweaks!

### 3.7.7 — 2026-01-19

Just a few tweaks!

## Apps similar to CALC Smart Calculator ±

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## More apps by QApps LLC

- [CALC Prime](https://appshunter.io/ios/app/calc-prime/id842563364)
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- [Loan Interest](https://appshunter.io/ios/app/loan-interest/id6496372832)

All apps by QApps LLC: https://appshunter.io/developer/395652397

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*