# AB Quantum vs DiverLog+

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.

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.

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.

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

## The numbers

| Metric | AB Quantum | DiverLog+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2.7K ratings)](https://appshunter.io/ios/app/ab-quantum/id785619104/reviews)** | [2.5 (111 ratings)](https://appshunter.io/ios/app/diverlog-plus/id1294460120/reviews) |
| Number of ratings | **2.7K** | 111 |
| Positive reviews | **44.7% of reviews** | 19.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | **#118** | — |
| Size | 299 MB | 89 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Applied Ballistics](https://appshunter.io/developer/785619107) | [Head Watersports S.p.A.](https://appshunter.io/developer/1193522423) |

## What reviewers say

### AB Quantum

[App page](https://appshunter.io/ios/app/ab-quantum/id785619104)

**Currently charting:** #118 Top Grossing · Sports (US App Store)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Elite Monthly | $2.99 | per month |
| Professional Monthly | $3.99 | per month |
| Elite Annual | $19.99 | per year |
| Professional Annual | $29.99 | per year |
| Custom Drag Model (CDM) for Berger 0.264cal 140gr Target Hybrid | $1.99 | one-time |
| Custom Drag Model (CDM) for Sierra 0.308cal 175gr MatchKing | $1.99 | one-time |
| Custom Drag Model (CDM) for Hornady 0.264cal 140gr ELD Match | $1.99 | one-time |
| Custom Drag Model (CDM) for Hornady 0.264cal 143gr ELD X | $1.99 | one-time |
| Custom Drag Model (CDM) for Hornady 0.264cal 147gr ELD Match | $1.99 | one-time |
| AB Caliber 0.224 CDMs | $9.99 | one-time |
| AB Caliber 0.243 CDMs | $9.99 | one-time |
| AB Caliber 0.264 CDMs | $9.99 | one-time |
| AB Caliber 0.284 CDMs | $9.99 | one-time |
| AB Caliber 0.308 CDMs | $9.99 | one-time |
| AB Caliber 0.338 CDMs | $9.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**Requested features**

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


### DiverLog+

[App page](https://appshunter.io/ios/app/diverlog-plus/id1294460120)

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:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- 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

**Requested features**

- 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


## Frequently asked 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.

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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.*