# Calculator Smart vs CTviewer+

The clearest difference is in-app purchases: CTviewer+ at none against Calculator Smart's 3. CTviewer+ also leads on ads (none vs shown). Calculator Smart's advantage is device support (6 vs 3). On price and iOS requirement there is nothing between them.

Both are free to download. Calculator Smart sells 3 one-off in-app purchases. CTviewer+ asks for nothing beyond the download.

## The numbers

| Metric | Calculator Smart | CTviewer+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (494 ratings)](https://appshunter.io/ios/app/calculator-smart/id698030968/reviews)** | — |
| Number of ratings | **494** | — |
| Positive reviews | 36.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 217 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple TV, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Miroslav Otsedarski](https://appshunter.io/developer/450091139) | [YU BO HAN](https://appshunter.io/developer/1714916214) |

## What reviewers say

### Calculator Smart

[App page](https://appshunter.io/ios/app/calculator-smart/id698030968)

This app offers a powerful and precise calculator for everyday math and advanced scientific computations. It features a clean interface with large buttons, supporting complex equations, multiple modes, and intuitive input methods. Personalize your experience with colorful skins and custom icons.

**Highlights:** 30+ scientific operations, Degrees and Radians support, Parentheses and nested equations, Intuitive input with slide-to-delete, Copy & Paste results, Apple Watch app and Lock Screen Widget, Colorful skins and custom icons

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Colorful Skins and Remove Ads | $1.99 | one-time |
| Colorful Skins | $1.99 | one-time |
| Colorful Skins for Mac app | $1.99 | one-time |


### CTviewer+

[App page](https://appshunter.io/ios/app/ctviewer-plus/id6777899393)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calculator Smart free?

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

### Is CTviewer+ free?

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

### Do Calculator Smart or CTviewer+ have ads?

Calculator Smart shows ads; CTviewer+ does not.

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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.*