# Conversion Calculator Units vs Metric Conversions Premium

The clearest difference is price: Conversion Calculator Units at Free against Metric Conversions Premium's $4.99. Conversion Calculator Units also leads on rating (4.7 vs 3.0) and ratings volume (5K vs 2). Metric Conversions Premium's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Conversion Calculator Units is free to download; Metric Conversions Premium costs $4.99 up front. Conversion Calculator Units sells 1 one-off in-app purchase. Metric Conversions Premium asks for nothing beyond the download.

Conversion Calculator Units holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Conversion Calculator Units has 5K ratings behind it against 2, 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 67% of Metric Conversions Premium's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 25, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Conversion Calculator Units | Metric Conversions Premium |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.7 (5K ratings)](https://appshunter.io/ios/app/conversion-calculator-units/id727632233/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/metric-conversions-premium/id6743940201/reviews) |
| Number of ratings | **5K** | 2 |
| Positive reviews | **82.1% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#164** |
| Size | 41 MB | 26 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RV AppStudios LLC](https://appshunter.io/developer/340181308) | [Wight Hat](https://appshunter.io/developer/1425885740) |

## 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


### Metric Conversions Premium

[App page](https://appshunter.io/ios/app/metric-conversions-premium/id6743940201)

**Currently charting:** #164 Top Paid · Utilities (US App Store)

This utility app offers a comprehensive suite of unit and currency conversions with a clean interface. It works offline and provides precise results, breaking down complex units into smaller components for detailed analysis. Users can save frequent conversions for quick access.

**Highlights:** No ads or data tracking, Offline functionality, Over 30,000 unit conversions, 130+ currencies with hourly updates, Save favorite conversions, Precise results up to 5 decimal places, Detailed unit breakdowns

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

**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 Metric Conversions Premium free?

Metric Conversions Premium costs $4.99, with no in-app purchases.

### Which has better reviews, Conversion Calculator Units or Metric Conversions Premium?

Conversion Calculator Units is rated higher. Conversion Calculator Units averages 4.7 out of 5 from 5K ratings, while Metric Conversions Premium averages 3.0 from 2 ratings.

### Do Conversion Calculator Units or Metric Conversions Premium have ads?

Conversion Calculator Units shows ads; Metric Conversions Premium does not.

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

Conversion Calculator Units ships an update every 2 months, and Metric Conversions Premium every 2 months. Most recently, Conversion Calculator Units was updated on September 25, 2026 and Metric Conversions Premium on September 13, 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.*