# Calculator # vs Chemistry Keyboard

The clearest difference is price: Calculator # at Free against Chemistry Keyboard's $1.99. Calculator # also leads on ratings volume (36K vs 17) and update cadence (every 2 months vs every 6 months). Chemistry Keyboard's advantage is in-app purchases (none vs 6) and ads (none vs shown). On rating and device support there is nothing between them.

Calculator # is free to download; Chemistry Keyboard costs $1.99 up front. Calculator # sells 6 in-app purchases, starting at $1.49 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 36K ratings behind it against 17, so its average is the more settled of the two. Written reviews are what separate them: 60% of Calculator #'s written reviews are positive against 88% of Chemistry Keyboard's.

Calculator # ships an update every 2 months, 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 (36K ratings)](https://appshunter.io/ios/app/calculator/id458535080/reviews) | **[4.6 (17 ratings)](https://appshunter.io/ios/app/chemistry-keyboard/id914964478/reviews)** |
| Number of ratings | **36K** | 17 |
| Positive reviews | 59.5% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 57 MB | 9 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Incpt.Mobis](https://appshunter.io/developer/445261166) | [Generally Helpful Software](https://appshunter.io/developer/286015711) |

## What reviewers say

### Calculator #

[App page](https://appshunter.io/ios/app/calculator/id458535080)

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

**Highlights:** Math Photos Solver, Handwriting Recognition, AI Math Problem Solver, Mathematical Display, Equation Solvers, 2D Graphing, Algebraic Functions

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Upgrade 1 Month | $1.49 | per month |
| PRO Upgrade 3 Months | $2.99 | per 3 months |
| PRO + Recognition 1 Month | $4.99 | per month |
| PRO + Recognition 3 Months | $11.99 | per 3 months |
| 250 AI Recognition & Queries | $0.99 | one-time |
| 600 AI Recognition & Queries | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Powerful functionality
- 💡 Helpful for math classes
- ⭐ Great for students
- 👌 Works like a real calculator

**What reviewers complain about**

- 🔍 Confusing interface after update
- 📢 Too many intrusive ads
- 💰 Paywall for advanced features
- 🐛 Incorrect calculations
- 🔇 Loud audio ads

**Reported bugs**

- Crashes when trying to use certain functions
- Handwriting recognition not working reliably
- Inability to input negative numbers

**Requested features**

- Add option to turn off animation
- Improve ad placement to avoid obstructing usage
- Provide more transparency on paid features


### 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 36K 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 2 months, 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.*