# JB4 Mobile vs UniE85 Manager

The clearest difference is review sentiment: UniE85 Manager at 100% against JB4 Mobile's 52%. UniE85 Manager also leads on price (Free vs $27.99) and rating (4.8 vs 3.8). JB4 Mobile's advantage is chart position (#2 vs unranked) and ratings volume (239 vs 40). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

UniE85 Manager is free to download; JB4 Mobile costs $27.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UniE85 Manager holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: JB4 Mobile has 239 ratings behind it against 40, 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 100% of UniE85 Manager's.

JB4 Mobile ships an update every 3 months, UniE85 Manager every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | JB4 Mobile | UniE85 Manager |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | [3.8 (239 ratings)](https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews) | **[4.8 (40 ratings)](https://appshunter.io/ios/app/unie85-manager/id6450461419/reviews)** |
| Number of ratings | **239** | 40 |
| Positive reviews | 52.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Best chart rank | **#2** | — |
| Size | 24 MB | 23 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786) | [Unitronic](https://appshunter.io/developer/1693388679) |

## What reviewers say

### JB4 Mobile

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

**Currently charting:** #2 Top Paid · Sports, #157 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


### UniE85 Manager

[App page](https://appshunter.io/ios/app/unie85-manager/id6450461419)

Monitor your vehicle's ethanol content wirelessly via Bluetooth. Calculate fuel blends for optimal performance and integrate data over your car's CAN-BUS with compatible hardware. Requires specific modules and software for full functionality.

**Highlights:** Wireless ethanol content viewing, CAN-BUS integration, E85 Mix Calculator, Bluetooth connectivity, Fuel blend calculations

**In-app purchases:** none


## Frequently asked questions

### Is JB4 Mobile free?

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

### Is UniE85 Manager free?

UniE85 Manager is free to download, with no in-app purchases.

### Which has better reviews, JB4 Mobile or UniE85 Manager?

UniE85 Manager is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while UniE85 Manager averages 4.8 from 40 ratings.

### Do JB4 Mobile or UniE85 Manager have ads?

Neither JB4 Mobile nor UniE85 Manager shows ads.

### Which is updated more often, JB4 Mobile or UniE85 Manager?

JB4 Mobile ships an update every 3 months, and UniE85 Manager every 2 months. Most recently, JB4 Mobile was updated on November 1, 2026 and UniE85 Manager on November 3, 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.*