Comparison

Encyclopedia of Guns vs Quick Conversion Units

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Encyclopedia of Guns

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
Read full description

Explore 281 articles on firearms, their design and history. Start with Firearm or the SIG Sauer P226, search for a topic, and follow related technical and historical references. This is a reference encyclopedia; it does not sell firearms. START WITH FIVE FREE ARTICLES New readers can choose any five different articles. Your chosen articles stay unlocked, and revisiting them never uses another choice. Existing readers keep previously granted access. MAKE DISCOVERIES YOUR OWN • Search article titles and full text • Follow links between related topics • Save articles and return to your reading position • Continue recent reading and track your progress • Explore connections through the timeline and graph • Find article sources and image credits inside the app CHOOSE YOUR ACCESS Own the full encyclopedia with a one-time purchase for complete offline reading. Or choose monthly or annual Premium for the full encyclopedia plus AI chat grounded in this subject's articles. Eligible new Premium subscribers receive a three-day introductory trial. Subscriptions renew automatically unless canceled through your App Store account. Current local prices and terms appear before purchase. Restore Purchases recovers eligible previous purchases. Earlier full-version ownership includes encyclopedia and offline access; Premium AI requires a subscription. Internet access is required for AI chat and purchases. AI answers may contain errors; consult the linked sources. Article text is derived from Wikipedia. Images come from appropriately licensed Wikimedia Commons and other open sources. Source links, licenses and credits are available in the app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Historical and technical reference. This app does not sell firearms.

About

Quick Conversion Units

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
Read full description

Quick Conversion Units for Oilfield is simple and easy to use. Conversions can be done without navigating to another screen. All options are included in one screen. Quick Conversion supports 19 different categories with 1000+ different conversion types. The Quick Conversion app has the following categories: Area Density Dynamic Viscosity Energy Heat Flux Heat Transfer Coefficient Kinematic Viscosity Length Mass Mass Flowrate Molar Flowrate Power Pressure Specific Energy Specific Heat Temperature Thermal Conductivity Volume Volumetric Flowrate We hope the Quick Conversion application increases your productivity and accuracy.

Screenshots

Encyclopedia of Guns4 screens
Quick Conversion Units3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard8 real differences · 2 level
Encyclopedia of Guns versus Quick Conversion Units: the parameters behind the verdict, then further details
ParameterEncyclopedia of GunsQuick Conversion Units
PriceFree — better$4.99
Rating3.7 (23 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings23 — better1
Update frequencyEvery 2 weeks — betterEvery 44 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.011.0 — better
Further details — not scored
Size92 MB32 MB
Age rating12+4+
DeveloperGood Spider, LLCbader alshammari

Customer experience

Encyclopedia of Guns

All ratings23 ratings
Positive69.6%
Neutral4.3%
Negative26.1%
Written reviews6 reviews
Positive50.0%
Neutral16.7%
Negative33.3%

Quick Conversion Units

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Encyclopedia of Guns

Subscriptions2
  • Monthly Premium3 Days trial$2.991 Month
  • Annual Premium3 Days trial$19.991 Year
One-time1
  • Full Version$9.99
None

Quick Conversion Units

No in-app purchases

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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