# Calculator HD++ vs CALC Smart Calculator ±

The clearest difference is in-app purchases: Calculator HD++ at none against CALC Smart Calculator ±'s 4. Calculator HD++ also leads on iOS requirement (10.0 vs 17.0). CALC Smart Calculator ±'s advantage is ads (none vs shown) and rating (4.8 vs 4.4). On price, review sentiment and device support 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. Calculator HD++ asks for nothing beyond the download.

CALC Smart Calculator ± holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: CALC Smart Calculator ± has 2.4K ratings behind it against 277, so its average is the more settled of the two. Written reviews point the same way: 82% of Calculator HD++'s written reviews are positive against 87% of CALC Smart Calculator ±'s.

Calculator HD++ ships an update monthly, CALC Smart Calculator ± fortnightly. Both last shipped on November 6, 2026.

## The numbers

| Metric | Calculator HD++ | CALC Smart Calculator ± |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (277 ratings)](https://appshunter.io/ios/app/calculator-hd-plus-plus/id444114618/reviews) | **[4.8 (2.4K ratings)](https://appshunter.io/ios/app/calc-smart-calculator/id576675190/reviews)** |
| Number of ratings | 277 | **2.4K** |
| Positive reviews | 81.6% of reviews | **87.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 35 MB | 16 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, Mac, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [smalltech sarl](https://appshunter.io/developer/289934568) | [QApps LLC](https://appshunter.io/developer/395652397) |

## What reviewers say

### Calculator HD++

[App page](https://appshunter.io/ios/app/calculator-hd-plus-plus/id444114618)

This application offers a high-precision calculation engine with a user-friendly interface. It allows for real-time result display as formulas are typed, supports multiple undo actions, and enables easy switching between workspaces. Users can also access persistent history, print calculations via AirPrint, and share history via email.

**Highlights:** High precision calculation engine, Results displayed while typing, Multiple undo functionality, Workspace switching, Persistent history, AirPrint compatibility, Email history sharing

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 💡 Detailed calculation history
- 🚀 Responsive and fast
- 👍 Helpful haptic feedback
- 👍 Intuitive interface

**What reviewers complain about**

- 🐛 Settings have missing parameters
- 🐛 Previous calculations won't go away
- 💸 Annoying ads
- 🔍 Difficult to clear history

**Reported bugs**

- Crashes after recent update
- Incompatibility with Bluetooth keyboards

**Requested features**

- Option to remove ads
- Ability to switch to hexadecimal mode
- Larger buttons for easier use


### 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


## Frequently asked questions

### Is Calculator HD++ free?

Calculator HD++ is free to download, with no in-app purchases.

### Is CALC Smart Calculator ± free?

CALC Smart Calculator ± is free to download, with in-app purchases available.

### Which has better reviews, Calculator HD++ or CALC Smart Calculator ±?

CALC Smart Calculator ± is rated higher. Calculator HD++ averages 4.4 out of 5 from 277 ratings, while CALC Smart Calculator ± averages 4.8 from 2.4K ratings.

### Do Calculator HD++ or CALC Smart Calculator ± have ads?

Calculator HD++ shows ads; CALC Smart Calculator ± does not.

### Which is updated more often, Calculator HD++ or CALC Smart Calculator ±?

Calculator HD++ ships an update monthly, and CALC Smart Calculator ± fortnightly. Most recently, Calculator HD++ was updated on November 6, 2026 and CALC Smart Calculator ± on November 6, 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.*