# Calculator # vs Conversion Calculator Units

Calculator # and Conversion Calculator Units both sit at 4.6 stars, but that hides the real split: 82% of Conversion Calculator Units's written reviews are positive against 60% of Calculator #'s. Calculator #'s advantage is ratings volume (36K vs 5K) and iOS requirement (12.1 vs 15.0). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Calculator # sells 6 in-app purchases, starting at $1.49 per month and Conversion Calculator Units sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for Calculator # against 4.7 for Conversion Calculator Units. That said, the two scores are not equally well evidenced: Calculator # has 36K ratings behind it against 5K, 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 82% of Conversion Calculator Units's.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on September 25, 2026.

## The numbers

| Metric | Calculator # | Conversion Calculator Units |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (36K ratings)](https://appshunter.io/ios/app/calculator/id458535080/reviews) | **[4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews)** |
| Number of ratings | **36K** | 5K |
| Positive reviews | 60.0% of reviews | **82.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 57 MB | 41 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) | [RV AppStudios LLC](https://appshunter.io/developer/340181308) |

## 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


### Conversion Calculator Units

[App page](https://appshunter.io/ios/app/conversion-calculator-units/id727632233)

This app offers a simple and powerful way to convert between over 140 units across 12 categories. Easily switch between units, customize your experience with themes, and share your results.

**Highlights:** Converts over 140 units, Supports 12 conversion categories, Customizable themes, Drag and set unit positions, Add units to favorites, Share converted units via email

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |

**What reviewers like**

- 👍 User-friendly
- 🚀 Easy to use
- 💡 Helpful for learning metric system
- 👍 Great for conversions
- 👍 Intuitive interface

**What reviewers complain about**

- 🐛 Ads disrupt usage
- 🐛 Difficult to change units
- 🐛 Lacks portrait mode
- 🐛 Upside-down orientation issues
- 🐛 Cluttered UI design

**Reported bugs**

- Ads not removed after purchase
- Incorrect unit conversions

**Requested features**

- Add pressure conversion units
- Include a basic calculator function
- Implement multi-language support
- Allow customization of unit order


## Frequently asked questions

### Is Calculator # free?

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

### Is Conversion Calculator Units free?

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

### Which has better reviews, Calculator # or Conversion Calculator Units?

Conversion Calculator Units is rated higher. Calculator # averages 4.6 out of 5 from 36K ratings, while Conversion Calculator Units averages 4.7 from 5K ratings.

### Do Calculator # or Conversion Calculator Units have ads?

Both Calculator # and Conversion Calculator Units show ads.

### Which is updated more often, Calculator # or Conversion Calculator Units?

Calculator # ships an update every 2 months, and Conversion Calculator Units every 2 months. Most recently, Calculator # was updated on September 25, 2026 and Conversion Calculator Units on September 25, 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.*