# Conversion Calculator Units vs Classicalc calculator

The clearest difference is price: Conversion Calculator Units at Free against Classicalc calculator's $0.99. Conversion Calculator Units also leads on rating (4.7 vs 3.8) and update cadence (every 2 months vs every 20 months). Classicalc calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown).

Conversion Calculator Units is free to download; Classicalc calculator costs $0.99 up front. Conversion Calculator Units sells 1 one-off in-app purchase. Classicalc calculator asks for nothing beyond the download.

Conversion Calculator Units holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Conversion Calculator Units has 5K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 82% of Conversion Calculator Units's written reviews are positive against 63% of Classicalc calculator's.

Conversion Calculator Units ships an update every 2 months, Classicalc calculator every 20 months. The most recent releases landed on November 8, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Conversion Calculator Units | Classicalc calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews)** | [3.8 (13 ratings)](https://appshunter.io/ios/app/classicalc-calculator/id989434780/reviews) |
| Number of ratings | **5K** | 13 |
| Positive reviews | **82.1% of reviews** | 62.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 20 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 41 MB | 14 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [RV AppStudios LLC](https://appshunter.io/developer/340181308) | [Lukasz Kowalski](https://appshunter.io/developer/792954012) |

## What reviewers say

### 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


### Classicalc calculator

[App page](https://appshunter.io/ios/app/classicalc-calculator/id989434780)

This calculator app offers instant calculations as you type, following the mathematical order of operations. It features unique piano sound themes and allows seamless continuation of calculations across iPhone and Apple Watch. Your equations are automatically saved for convenience.

**Highlights:** Instant calculation as you type, Mathematical order of operators, Cross-device continuity (iPhone/Watch), Automatic equation saving, 14 piano sound themes, Copy result to clipboard

**In-app purchases:** none


## Frequently asked questions

### Is Conversion Calculator Units free?

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

### Is Classicalc calculator free?

Classicalc calculator costs $0.99, with no in-app purchases.

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

Conversion Calculator Units is rated higher. Conversion Calculator Units averages 4.7 out of 5 from 5K ratings, while Classicalc calculator averages 3.8 from 13 ratings.

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

Conversion Calculator Units shows ads; Classicalc calculator does not.

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

Conversion Calculator Units ships an update every 2 months, and Classicalc calculator every 20 months. Most recently, Conversion Calculator Units was updated on November 8, 2026 and Classicalc 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.*