# Calculator + vs Chemistry Keyboard

The clearest difference is price: Calculator + at Free against Chemistry Keyboard's $1.99. Calculator + also leads on update cadence (every 5 days vs every 6 months) and ratings volume (10K vs 17). Chemistry Keyboard's advantage is in-app purchases (none vs 10) and ads (none vs shown). On rating, review sentiment, device support and iOS requirement there is nothing between them.

Calculator + is free to download; Chemistry Keyboard costs $1.99 up front. Calculator + sells 10 in-app purchases, starting at $4.99 per month. Chemistry Keyboard asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Calculator + against 4.6 for Chemistry Keyboard. That said, the two scores are not equally well evidenced: Calculator + has 10K ratings behind it against 17, so its average is the more settled of the two. Written reviews are what separate them: 85% of Calculator +'s written reviews are positive against 88% of Chemistry Keyboard's.

Calculator + ships an update every 5 days, Chemistry Keyboard every 6 months. The most recent releases landed on November 3, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Calculator + | Chemistry Keyboard |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.6 (10K ratings)](https://appshunter.io/ios/app/calculator-plus/id351815470/reviews) | **[4.6 (17 ratings)](https://appshunter.io/ios/app/chemistry-keyboard/id914964478/reviews)** |
| Number of ratings | **10K** | 17 |
| Positive reviews | 84.9% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 6 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 50 MB | 9 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [xNeat.com](https://appshunter.io/developer/327498295) | [Generally Helpful Software](https://appshunter.io/developer/286015711) |

## What reviewers say

### Calculator +

[App page](https://appshunter.io/ios/app/calculator-plus/id351815470)

This app offers a free basic and scientific calculator with an elegant interface. Upgrade for advanced features like graphing, equation solving, and unit conversions. Supports fractions, percentages, and multiple themes.

**Highlights:** Free basic and scientific calculator, Elegant and intuitive interface, Advanced editing and equation display, Fraction and percent support, Graphing and equation solving, Base converter and multiple themes

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scientific Calculator | $4.99 | per month |
| Calculator | $39.99 | per year |
| Linear Calculator | $2.99 | one-time |
| Factoring Calculator | $2.99 | one-time |
| Handwriting Calculator | $2.99 | one-time |
| Graphing Calculator | $3.99 | one-time |
| Fraction Calculator | $3.99 | one-time |
| Scientific Calculator | $4.99 | one-time |
| Calculator Plus | $4.99 | one-time |
| Calculator | $16.99 | one-time |

**What reviewers like**

- 👍 Great features and easy to use
- 👍 Efficient and quick
- 👍 Versatile, functional calculator
- 👍 Fantastic, easy to use app
- 👍 Awesome calculator app

**What reviewers complain about**

- 🐛 New updated layout is awful
- 🐛 App is now terrible
- 🔒 Paying customer screwed over by update
- 🔒 Now timed trial, no free w/ads version
- 🔒 Not honest

**Reported bugs**

- Fraction calculator has TWO subtraction buttons and NO division button
- Decimals seem to be changed to fraction with no apparent way of changing it back
- Functionality is dropped by forcing you to the main menu every time you open it
- Currency converter broken
- Login screen freezes

**Requested features**

- Add mod function
- Add commas
- Add 1/x function
- Support for Retina Display
- Add number 4 with two lines


### Chemistry Keyboard

[App page](https://appshunter.io/ios/app/chemistry-keyboard/id914964478)

Easily input chemical formulas with specialized superscript, subscript, and arrow characters. Access lowercase Greek letters and other chemistry-related Unicode symbols. This keyboard extension works offline and includes a demo for viewing Wikipedia data.

**Highlights:** Superscript characters, Subscript characters, Arrow glyphs, Lowercase Greek characters, Chemistry Unicode characters, Offline functionality, Wikipedia data lookup demo

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calculator + free?

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

### Is Chemistry Keyboard free?

Chemistry Keyboard costs $1.99, with no in-app purchases.

### Which has better reviews, Calculator + or Chemistry Keyboard?

Chemistry Keyboard is rated higher. Calculator + averages 4.6 out of 5 from 10K ratings, while Chemistry Keyboard averages 4.6 from 17 ratings.

### Do Calculator + or Chemistry Keyboard have ads?

Calculator + shows ads; Chemistry Keyboard does not.

### Which is updated more often, Calculator + or Chemistry Keyboard?

Calculator + ships an update every 5 days, and Chemistry Keyboard every 6 months. Most recently, Calculator + was updated on November 3, 2026 and Chemistry Keyboard 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.*