# Calc vs Unit Converter

The clearest difference is rating: Unit Converter at 4.9 against Calc's 3.9. Unit Converter also leads on update cadence (every 9 days vs every 2 months) and review sentiment (100% vs 81%). Calc's advantage is monetization model (free vs freemium). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Calc sells 2 in-app purchases, starting at $0.99 per month and Unit Converter sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Unit Converter holds the better App Store score, 4.9 against 3.9. Both are backed by a comparable volume of ratings — 28 and 17 respectively. Written reviews point the same way: 81% of Calc's written reviews are positive against 100% of Unit Converter's.

Calc ships an update every 2 months, Unit Converter every 9 days. The most recent releases landed on September 20, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Calc | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (28 ratings)](https://appshunter.io/ios/app/calc/id285807159/reviews) | **[4.9 (17 ratings)](https://appshunter.io/ios/app/unit-converter-uneat/id1668309493/reviews)** |
| Number of ratings | **28** | 17 |
| Positive reviews | 80.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | **Free** | Freemium |
| Size | 1 MB | 15 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Mike Wesemann](https://appshunter.io/developer/285807162) | [ZIJIAN CHEN](https://appshunter.io/developer/1668309495) |

## What reviewers say

### Calc

[App page](https://appshunter.io/ios/app/calc/id285807159)

A visually appealing and straightforward calculator app for iPhone and iPad. It offers a unique user interface with support for basic and scientific calculations, various number base conversions, and currency and unit conversions.

**Highlights:** Universal app for iPhone and iPad, Basic and scientific calculations, Number base conversions (decimal, hex, binary, octal), Currency and unit conversions, Scrollable calculation history, 10 color themes

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calc Pro | $0.99 | per month |
| Calc Pro | $4.99 | per year |

**What reviewers like**

- 🚀 Free app
- 👍 Simple and easy to use
- 📜 Tape/history feature
- 🎨 Customizable colors
- 📤 Ability to email calculations

**What reviewers complain about**

- 🐛 Crashes or freezes on some devices
- 🔊 Annoying key click sounds
- 📜 Scrolling to see recent calculations
- 🔍 Overcrowded interface with too many functions

**Reported bugs**

- Percentage calculations not working correctly
- Cos 90 showing incorrect result

**Requested features**

- Copy and paste support
- Larger buttons for easier use
- Ability to clear calculation history
- Auto-insert previous result when using operators
- Landscape mode support


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-uneat/id1668309493)

This utility app offers conversion for over 100 units across 18 categories, including length, mass, temperature, and digital storage. It supports a wide range of specific units within each category and provides a clean, ad-free interface for quick conversions.

**Highlights:** 18 unit categories, Over 100 units supported, Ad-free experience, Supports multiple devices, Pro version with free trial

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version (1 Month) | $0.99 | per month |
| 1 cup of orange juice. | $0.99 | one-time |
| 1 litre of orange juice. | $2.99 | one-time |
| Pro Version (Lifetime) | $3.99 | one-time |


## Frequently asked questions

### Is Calc free?

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

### Is Unit Converter free?

Unit Converter is free to download, with in-app purchases available.

### Which has better reviews, Calc or Unit Converter?

Unit Converter is rated higher. Calc averages 3.9 out of 5 from 28 ratings, while Unit Converter averages 4.9 from 17 ratings.

### Do Calc or Unit Converter have ads?

Neither Calc nor Unit Converter shows ads.

### Which is updated more often, Calc or Unit Converter?

Calc ships an update every 2 months, and Unit Converter every 9 days. Most recently, Calc was updated on September 20, 2026 and Unit Converter on June 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*