# JB4 Mobile vs BLAZER LINK II

The clearest difference is price: BLAZER LINK II at Free against JB4 Mobile's $27.99. BLAZER LINK II also leads on update cadence (every 3 days vs every 3 months) and iOS requirement (9.0 vs 15.1). JB4 Mobile's advantage is rating (3.8 vs 2.3) and review sentiment (52% vs 17%). On ads, in-app purchases, monetization model and device support there is nothing between them.

BLAZER LINK II 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 2.3. That said, the two scores are not equally well evidenced: JB4 Mobile has 239 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 52% of JB4 Mobile's written reviews are positive against 17% of BLAZER LINK II's.

JB4 Mobile ships an update every 3 months, BLAZER LINK II every 3 days. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | JB4 Mobile | BLAZER LINK II |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | **[3.8 (239 ratings)](https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews)** | [2.3 (18 ratings)](https://appshunter.io/ios/app/blazer-link-ii/id1481326897/reviews) |
| Number of ratings | **239** | 18 |
| Positive reviews | **52.4% of reviews** | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free | Free |
| Best chart rank | **#5** | — |
| Size | 24 MB | 7 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) | [Hopkins Manufacturing Corporation](https://appshunter.io/developer/1503581619) |

## What reviewers say

### JB4 Mobile

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

**Currently charting:** #5 Top Paid · Sports, #178 Top Paid (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


### BLAZER LINK II

[App page](https://appshunter.io/ios/app/blazer-link-ii/id1481326897)

Control vehicle LED lights and accessories wirelessly from your smartphone. This system connects to a 12 VDC Wireless Management System, offering control over four output terminals.

**Highlights:** Wireless control of vehicle accessories, Connects to 12 VDC Wireless Management System, Controls 4 output terminals, Smartphone integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JB4 Mobile free?

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

### Is BLAZER LINK II free?

BLAZER LINK II is free to download, with no in-app purchases.

### Which has better reviews, JB4 Mobile or BLAZER LINK II?

JB4 Mobile is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while BLAZER LINK II averages 2.3 from 18 ratings.

### Do JB4 Mobile or BLAZER LINK II have ads?

Neither JB4 Mobile nor BLAZER LINK II shows ads.

### Which is updated more often, JB4 Mobile or BLAZER LINK II?

JB4 Mobile ships an update every 3 months, and BLAZER LINK II every 3 days. Most recently, JB4 Mobile was updated on October 19, 2026 and BLAZER LINK II on October 15, 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.*