Comparison

BulletDrop+ vs AB Quantum

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

Head to head
About

BulletDrop+

Calculate bullet trajectory, energy, and drift with precise inputs. Store custom loads, fetch weather data, and choose output units for accurate shooting predictions. Ideal for handloaders and shooters to understand cartridge performance.

Highlights
  • External ballistics calculation
  • iCloud support for load data
  • Store commonly used datasets
  • Selectable drag function
  • Selectable output units (inches, MOA, mils)
  • Fetch weather conditions
Features
Read full description

A simple, easy to use external ballistics calculator. It accepts inputs of bullet weight, ballistic coefficient, muzzle velocity, sight height, zero range, wind speed & angle, etc and calculates velocity, energy, flight path, and drift. Features: * iCloud support. Store load data on iCloud and have it available on all your iCloud-enabled iOS devices. * Clean & simple user interface. * Store commonly used datasets. * Selectable drag function for ballistic coefficients calculate based upon models. * Selectable output units: inches, MOA, & mils. * Selectable max range and range increments under Settings. * Fetch weather conditions for your location. BulletDrop+ is intended for hand loaders and shooters of all varieties. It give them an idea what various cartridges and load recipes will do at the range. As alway, the information provided by BulletDrop+, or any other calculator, is no substitute for actual range time. Get out and shoot!

About

AB Quantum

This app provides a comprehensive ballistics solver and profile management tool for long-range shooting. It features a new user interface designed for single-handed use, enabling quick solutions and seamless integration with Bluetooth-enabled devices. Users can sync gun profiles, create customizable range cards, and access an updated reticle library.

Highlights
  • Ballistics solver
  • Profile management
  • Bluetooth device integration
  • Customizable range/target cards
  • Reticle library
  • Ballistic truing
  • Chronograph integration
Features
Currently charting
Read full description

Applied Ballistics Quantum™ is a state-of-the-art app integrating the most complete ballistics solver and profile management tool for long-range shooting. Featuring an all new user-interface, AB Quantum™ includes a host of new tools and features that will enable shooters and hunters to be more successful in the field. AB Quantum™ creates a new paradigm for ballistic solvers and integration with Bluetooth®-enabled devices. With a host of new features, the platform is designed to save time and add performance for users of all skill levels. The all new user-interface is designed with single-handed use in mind, putting all major features just a swipe or tap away from any screen, which allows users to rapidly obtain solutions in the field or at a match. The simplicity and versatility of the app interface creates an intuitive experience for both new and experienced users. Two new features - AB Quantum Connect™ and AB Quantum Sync™ - enable users to quickly connect to other AB-enabled devices and sync gun profiles between them in seconds, as well as back those profiles up to an encrypted server for peace of mind and easy restoration. The new platform automatically saves changes made to rifle profiles and updates connected devices without the user needing to do anything. For competitors or hunters, AB Quantum™ includes customizable Range and Multi-Target tables. This allows users to lay out the displayed information to exactly what they need to hit their target. After creating a range or target card, it can easily be shared via email. Built with the future in mind, the new AB Quantum™ platform allows for continuous innovation. At launch the following new features will be available: • AB Quantum™ User Interface - Take control of ballistic data and find solutions with ease using the new layout designed with one-handed operation in mind. • New Bluetooth® Device Manager - Find and connect AB Bluetooth® devices quickly and send data between devices using AB Quantum Connect™. • AB Quantum Sync™ - User gun profiles are automatically uploaded to an encrypted server to allow easy access for other devices and backup, providing peace of mind and security. • Customizable Range Card and Target Card Modes - The new expandable and customizable range and target card modes allow users to select what data to see for each Range or Target. Use the share function to send range and data cards in just seconds. • New Reticle Library - The AB Reticle library is hosted online and updates in AB Quantum™ automatically, providing users with up-to-date solution drawing for their favorite rifle scopes. • Improved Truing Interface - Easy to access ballistic truing features without leaving solution screens. • Chronograph Integration - Connect Bluetooth®-enabled chronographs - such as the Optex Systems SpeedTracker™ - directly to the app and save the velocity data to rifle profiles.

Screenshots

BulletDrop+4 screens
AB Quantum4 screens

Verdict

The call

The clearest difference is rating: AB Quantum at 4.7 against BulletDrop+'s 3.9. AB Quantum also leads on update cadence (fortnightly vs every 4 months) and ratings volume (2.7K vs 76). BulletDrop+'s advantage is iOS requirement (13.0 vs 16.0). On price, review sentiment, ads and in-app purchases 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

Both are free to download. BulletDrop+ sells 6 one-off in-app purchases and AB Quantum sells 15 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

AB Quantum holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: AB Quantum has 2.7K ratings behind it against 76, so its average is the more settled of the two. Written reviews complicate that: 51% of BulletDrop+'s written reviews are positive against 45% of AB Quantum's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

BulletDrop+ ships an update every 4 months, AB Quantum fortnightly. The most recent releases landed on October 13, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 6 level
BulletDrop+ versus AB Quantum: the parameters behind the verdict, then further details
ParameterBulletDrop+AB Quantum
PriceFreeFree
Rating3.9 (76 ratings)4.7 (2.7K ratings) — better
Positive reviews51.4% of reviews — better44.9% of reviews
Number of ratings762.7K — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#101 — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size2 MB299 MB
Age rating4+4+
DeveloperMark DescalzoApplied Ballistics

Customer experience

BulletDrop+

All ratings76 ratings
Positive68.4%
Neutral13.2%
Negative18.4%
Written reviews74 reviews
Positive51.4%
Neutral18.9%
Negative29.7%

AB Quantum

All ratings2,695 ratings
Positive93.8%
Neutral2.0%
Negative4.2%
Written reviews256 reviews
Positive44.9%
Neutral11.7%
Negative43.4%

Bugs and requests

BulletDrop+

Not enough reviews yet to summarise bugs or requests.

AB Quantum

Reported bugs

4 issues
  • Bullet BC not retaining custom values
  • Profiles disappearing after updates
  • Atmospheric data not syncing correctly
  • Ballistics calculations not matching real-world data

Requested features

5 requests
  • Apple Watch app
  • More reticle options
  • Metric unit support
  • Backup and restore functionality
  • Improved range card and target card features

In-app purchases

6 purchases

BulletDrop+

One-time6
  • Chocolate Bar$0.99
  • Cup of Coffee$1.99
  • Doughnut$2.99
Show 3 more
  • Coffee-themed Beverage$4.99
  • Bag of Coffee$14.99
  • Sack of Coffee$29.99
15 purchases

AB Quantum

Subscriptions4
  • Elite Monthly$2.991 Month
  • Professional Monthly$3.991 Month
  • Elite Annual$19.991 Year
Show 1 more
  • Professional Annual3 Days trial$29.991 Year
One-time11
  • Custom Drag Model (CDM) for Berger 0.264cal 140gr Target Hybrid$1.99
  • Custom Drag Model (CDM) for Sierra 0.308cal 175gr MatchKing$1.99
  • Custom Drag Model (CDM) for Hornady 0.264cal 140gr ELD Match$1.99
Show 8 more
  • Custom Drag Model (CDM) for Hornady 0.264cal 143gr ELD X$1.99
  • Custom Drag Model (CDM) for Hornady 0.264cal 147gr ELD Match$1.99
  • AB Caliber 0.224 CDMs$9.99
  • AB Caliber 0.243 CDMs$9.99
  • AB Caliber 0.264 CDMs$9.99
  • AB Caliber 0.284 CDMs$9.99
  • AB Caliber 0.308 CDMs$9.99
  • AB Caliber 0.338 CDMs$9.99

Questions

Is BulletDrop+ free?
BulletDrop+ is free to download, with in-app purchases available.
Is AB Quantum free?
AB Quantum is free to download, with in-app purchases available.
Which has better reviews, BulletDrop+ or AB Quantum?
AB Quantum is rated higher. BulletDrop+ averages 3.9 out of 5 from 76 ratings, while AB Quantum averages 4.7 from 2.7K ratings.
Do BulletDrop+ or AB Quantum have ads?
Neither BulletDrop+ nor AB Quantum shows ads.
Which is updated more often, BulletDrop+ or AB Quantum?
BulletDrop+ ships an update every 4 months, and AB Quantum fortnightly. Most recently, BulletDrop+ was updated on October 13, 2026 and AB Quantum on October 12, 2026.

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