Comparison

AB Quantum vs DiverLog+

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

Head to head
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.

About

DiverLog+

This app allows divers to digitally log and manage all aspects of their underwater adventures. Track dive details, gear, buddies, and locations. Sync data with dive computers and cloud backups, and share your experiences.

Highlights
  • Manage dive details
  • Search dives by location/buddy
  • Manage dive spots and gear
  • Track personal medical/certification info
  • Add photos and videos
  • Sync with desktop/cloud
  • Download/upload dive computer data
Features
Read full description

The DiverLog+ for mobile app is the premier full-featured dive log application. DiverLog+ is the Official App for Bluetooth Smart dive computers made by the following manufacturers: AQUALUNG, APEKS, HUISH/OCEANIC, SHERWOOD. FEATURES - View, edit, and manage your DC dive detail data - Search dives based on location, dive type, buddies, many more - View, edit and manage your favorite dive spots and locations - View, edit and manage your dive gear, buddies - Keep track of personal data including medical and certification information - Upload slates, MY INFO, GPS Location to Dive Computer (DSX only) - Add photos, Youtube video links to dives, and remember those fun times - Social sharing features - Synchronize with DiverLog application for desktop, laptop, and mobiles devices - Download dive data from Dive Computer, upload your desired settings to Dive Computer, update firmware to Dive Computer using Bluetooth Smart (currently supports BEACON, CALM-ACT, DSX, i200C, i300C, i330R, i330R Console, i470TC, i550C, i750TC, i770R, GEO 4.0, GEO AIR, PROPLUS 4.0, PROPLUS X, SAGE, VEO 4.0, WISDOM 4.0) - Much more ... SUMMARY DiverLog+ allows you to view, edit, and manage your dives easily. The dive detail section gives you all the information you need, including dive data, location and dive site information, tank and buddy information, gear bag, and more. Add your diving buddies and keep your personal certification and medical information on hand at all times. View your dive profile in full screen view. Add and manage your gear with easy entry forms. DiverLog+ offers you simple search methods to find your dives .. search by location, dive site, and even which computer you used! ...See all your dives on the world map, a unique feature we call your dive activity map! You can even keep track of your personal information, including medical and certification info. You can now sync your dives with the DiveCloud online dive data backup system so you never lose your dives, and always have them available, wherever you are! Connect with our developers by posting in the forum, or contact by email at the support website: https://ediverlog.com

Screenshots

AB Quantum4 screens
DiverLog+4 screens

Verdict

The call

The clearest difference is rating: AB Quantum at 4.7 against DiverLog+'s 2.5. AB Quantum also leads on review sentiment (45% vs 19%) and ratings volume (2.7K vs 111). DiverLog+'s advantage is in-app purchases (none vs 15) and iOS requirement (9.0 vs 16.0). On price, ads, monetization model 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

Both are free to download. AB Quantum sells 15 in-app purchases, starting at $2.99 per month. DiverLog+ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AB Quantum holds the better App Store score, 4.7 against 2.5. That said, the two scores are not equally well evidenced: AB Quantum has 2.7K ratings behind it against 111, so its average is the more settled of the two. Written reviews point the same way: 45% of AB Quantum's written reviews are positive against 19% of DiverLog+'s.

UpkeepUpdate frequency

AB Quantum ships an update fortnightly, DiverLog+ every 5 weeks. The most recent releases landed on September 23, 2026 and September 4, 2026 respectively.

Scorecard7 real differences · 4 level
AB Quantum versus DiverLog+: the parameters behind the verdict, then further details
ParameterAB QuantumDiverLog+
PriceFreeFree
Rating4.7 (2.7K ratings) — better2.5 (111 ratings)
Positive reviews44.7% of reviews — better19.1% of reviews
Number of ratings2.7K — better111
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFreemium
Best chart rank#124 — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.09.0 — better
Further details — not scored
Size299 MB89 MB
Age rating4+4+
DeveloperApplied BallisticsHead Watersports S.p.A.

Customer experience

AB Quantum

All ratings2,695 ratings
Positive93.8%
Neutral2.0%
Negative4.2%
Written reviews253 reviews
Positive44.7%
Neutral11.9%
Negative43.5%

DiverLog+

All ratings111 ratings
Positive26.1%
Neutral18.0%
Negative55.9%
Written reviews136 reviews
Positive19.1%
Neutral19.9%
Negative61.0%

User reviews

AB Quantum

From 2.7K App Store ratings

What we love

  • 🚀 Best ballistic app
  • 👍 Accurate ballistic calculations
  • 👍 Comprehensive features
  • 👍 Great support
  • 👍 Easy to use once set up

Room to improve

  • 🐛 Buggy after updates
  • 🐛 Connectivity issues with Kestrel
  • 🐛 Glitches with user interface
  • 👎 Difficult to navigate
  • 👎 Outdated interface

DiverLog+

From 111 App Store ratings

What we love

  • 🚀 Easy Bluetooth sync with dive computers
  • 📸 Photo and video storage integration
  • 📝 Comprehensive dive logging features
  • ⚙️ Convenient app-based computer settings
  • 🤝 Buddy and gear management

Room to improve

  • 🐛 Frequent app crashes
  • 💾 Data loss on phone replacement
  • 🔗 No cloud backup by default
  • ❌ No cross-device synchronization
  • 🔐 Unreliable account login system

Bugs and 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

DiverLog+

Reported bugs

28 issues
  • App crashes when downloading/syncing dives
  • Crashes during firmware updates
  • Crashes when accessing settings or verification
  • All dive data lost after app reinstall
  • Data loss when switching phones
Show 23 more
  • Bluetooth connection failures
  • Firmware update stuck at 99%
  • Incorrect elapsed dive time calculations
  • Download timeouts around 50%
  • GPS coordinates disappear after naming dive site
  • Tank pressure not auto-populated from wireless transmitter
  • Dive computer not recognized after updates
  • Sync failures with dive cloud
  • Cannot add photos or videos
  • Incomplete label text in log lists
  • Time synchronization not working
  • Settings revert to English/Anglo-Saxon format
  • Cannot update GPS locations for dive sites
  • Dive data shows incorrect tanks and mixes
  • Map displays wrong locations (e.g., Antarctica instead of Galapagos)
  • Keyboard input issues on iPad
  • App crashes on specific iPhone models
  • Network errors on login
  • Cannot edit personal information (blood type, insurance)
  • Graph display showing blank/white after updates
  • Account creation confusion
  • Password reset not working
  • Dives disappear after login

Requested features

20 requests
  • Cloud backup and sync across devices
  • iPad-optimized version with landscape mode
  • Cumulative dive time and average RMV statistics
  • Average depth per dive display
  • Merge/combine multiple dives into one
Show 15 more
  • Export to Excel or other formats
  • Ability to re-download deleted dives
  • Edit and delete dive locations easily
  • Back buttons in data entry forms
  • Photo thumbnails in dive log list
  • Safety stop indication during dives
  • Heart rate tracking integration
  • Ability to split dives recorded as one
  • Search by depth ranges (greater than/less than)
  • Multi-location search capability
  • Separate logs for scuba vs freediving
  • Battery indicator for dive computer
  • Customizable gear bag items
  • Manual GPS coordinate input and editing
  • Offline mode capability

In-app purchases

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
None

DiverLog+

No in-app purchases

Questions

Is AB Quantum free?
AB Quantum is free to download, with in-app purchases available.
Is DiverLog+ free?
DiverLog+ is free to download, with no in-app purchases.
Which has better reviews, AB Quantum or DiverLog+?
AB Quantum is rated higher. AB Quantum averages 4.7 out of 5 from 2.7K ratings, while DiverLog+ averages 2.5 from 111 ratings.
Do AB Quantum or DiverLog+ have ads?
Neither AB Quantum nor DiverLog+ shows ads.
Which is updated more often, AB Quantum or DiverLog+?
AB Quantum ships an update fortnightly, and DiverLog+ every 5 weeks. Most recently, AB Quantum was updated on September 23, 2026 and DiverLog+ on September 4, 2026.

Other comparisons