# Encyclopedia of Guns vs Quick Conversion Units

The clearest difference is review sentiment: Quick Conversion Units at 100% against Encyclopedia of Guns's 50%. Quick Conversion Units also leads on rating (5.0 vs 3.7) and in-app purchases (none vs 3). Encyclopedia of Guns's advantage is price (Free vs $4.99) and update cadence (every 2 weeks vs every 44 months). On ads and device support there is nothing between them.

Encyclopedia of Guns is free to download; Quick Conversion Units costs $4.99 up front. Encyclopedia of Guns sells 3 in-app purchases, starting at $2.99 per month. Quick Conversion Units asks for nothing beyond the download.

Quick Conversion Units holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Encyclopedia of Guns has 23 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Encyclopedia of Guns's written reviews are positive against 100% of Quick Conversion Units's.

Encyclopedia of Guns ships an update every 2 weeks, Quick Conversion Units every 44 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Encyclopedia of Guns | Quick Conversion Units |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.7 (23 ratings)](https://appshunter.io/ios/app/encyclopedia-of-guns/id1126982388/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quick-conversion-units/id1159050734/reviews)** |
| Number of ratings | **23** | 1 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 44 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 92 MB | 32 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Good Spider, LLC](https://appshunter.io/developer/1487595667) | [bader alshammari](https://appshunter.io/developer/858126240) |

## What reviewers say

### Encyclopedia of Guns

[App page](https://appshunter.io/ios/app/encyclopedia-of-guns/id1126982388)

Explore a vast collection of articles and HD photos detailing thousands of firearms, from historical to modern. This educational tool is suitable for all ages, offering comprehensive information and an engaging user experience. Read offline and collect badges for your learning progress.

**Highlights:** Thousands of articles and HD photos, Comprehensive gun information, User-friendly interface, Offline availability, Badge collection system, Suitable for all ages

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $19.99 | per year |
| Full Version | $9.99 | one-time |


### Quick Conversion Units

[App page](https://appshunter.io/ios/app/quick-conversion-units/id1159050734)

This app offers a streamlined conversion experience for oilfield professionals. It provides over 1000 conversion types across 19 categories, all accessible on a single screen for maximum efficiency and accuracy.

**Highlights:** Single-screen conversions, 19 conversion categories, 1000+ conversion types, Oilfield specific units, Increases productivity, Enhances accuracy

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

**In-app purchases:** none


## Frequently asked questions

### Is Encyclopedia of Guns free?

Encyclopedia of Guns is free to download, with in-app purchases available.

### Is Quick Conversion Units free?

Quick Conversion Units costs $4.99, with no in-app purchases.

### Which has better reviews, Encyclopedia of Guns or Quick Conversion Units?

Quick Conversion Units is rated higher. Encyclopedia of Guns averages 3.7 out of 5 from 23 ratings, while Quick Conversion Units averages 5.0 from 1 ratings.

### Do Encyclopedia of Guns or Quick Conversion Units have ads?

Neither Encyclopedia of Guns nor Quick Conversion Units shows ads.

### Which is updated more often, Encyclopedia of Guns or Quick Conversion Units?

Encyclopedia of Guns ships an update every 2 weeks, and Quick Conversion Units every 44 months. Most recently, Encyclopedia of Guns was updated on October 26, 2026 and Quick Conversion Units on October 24, 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.*