# JB4 Mobile vs DiverLog+

The clearest difference is price: DiverLog+ at Free against JB4 Mobile's $27.99. DiverLog+ also leads on update cadence (every 5 weeks vs every 3 months) and iOS requirement (9.0 vs 15.1). JB4 Mobile's advantage is rating (3.8 vs 2.5) and review sentiment (52% vs 19%). On ratings volume, ads, in-app purchases and device support there is nothing between them.

DiverLog+ is free to download; JB4 Mobile costs $27.99 up front. Neither carries in-app purchases, so what you see is what you pay.

JB4 Mobile holds the better App Store score, 3.8 against 2.5. Both are backed by a comparable volume of ratings — 239 and 111 respectively. Written reviews point the same way: 52% of JB4 Mobile's written reviews are positive against 19% of DiverLog+'s.

JB4 Mobile ships an update every 3 months, DiverLog+ every 5 weeks. The most recent releases landed on September 23, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | JB4 Mobile | DiverLog+ |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | **[3.8 (239 ratings)](https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews)** | [2.5 (111 ratings)](https://appshunter.io/ios/app/diverlog-plus/id1294460120/reviews) |
| Number of ratings | **239** | 111 |
| Positive reviews | **52.4% of reviews** | 19.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | **Free** | Freemium |
| Best chart rank | **#4** | — |
| Size | 24 MB | 89 MB |
| Requires iOS | 15.1 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786) | [Head Watersports S.p.A.](https://appshunter.io/developer/1193522423) |

## What reviewers say

### JB4 Mobile

[App page](https://appshunter.io/ios/app/jb4-mobile/id794841332)

**Currently charting:** #4 Top Paid · Sports (US App Store)

This app acts as a mobile data logger and display for vehicles equipped with a JB4 tuner. It allows users to monitor and log various engine parameters, view data in real-time, and adjust settings for performance tuning.

**Highlights:** Live gauge monitoring, Data logging and graphing, User adjustable settings, WMI settings modification, On-the-fly map switching, Code reading and deletion

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app and a must have with the JB4
- 🔒 Robust security features
- 👍 Awesome data logging
- 👍 Incredible Support
- 👍 Works as expected

**What reviewers complain about**

- 🐛 Doesn't work properly, screen upside down and backwards
- 🐛 Stopped working after update
- 🐛 Bluetooth connection issues
- 🐛 Gauges freezing
- 🐛 Screen turns off

**Reported bugs**

- App crashes
- Can't connect to server
- Mirrored/inverted display
- Compatibility issues with new iOS versions
- Trouble logging in

**Requested features**

- Add CarPlay support
- Allow customizing map names
- Add more gauge styling options
- Improve UI and layout
- Integrate with Apple Carplay


### 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 JB4 Mobile free?

JB4 Mobile costs $27.99, with no in-app purchases.

### Is DiverLog+ free?

DiverLog+ is free to download, with no in-app purchases.

### Which has better reviews, JB4 Mobile or DiverLog+?

JB4 Mobile is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while DiverLog+ averages 2.5 from 111 ratings.

### Do JB4 Mobile or DiverLog+ have ads?

Neither JB4 Mobile nor DiverLog+ shows ads.

### Which is updated more often, JB4 Mobile or DiverLog+?

JB4 Mobile ships an update every 3 months, and DiverLog+ every 5 weeks. Most recently, JB4 Mobile 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.*