# UniE85 Manager vs JB4 PRO

The clearest difference is review sentiment: UniE85 Manager at 100% against JB4 PRO's 50%. UniE85 Manager also leads on rating (4.8 vs 4.4) and iOS requirement (13.0 vs 16.0). JB4 PRO's advantage is update cadence (every 2 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UniE85 Manager holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 40 and 14 respectively. Written reviews point the same way: 100% of UniE85 Manager's written reviews are positive against 50% of JB4 PRO's.

UniE85 Manager ships an update every 2 months, JB4 PRO every 2 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | UniE85 Manager | JB4 PRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (40 ratings)](https://appshunter.io/ios/app/unie85-manager/id6450461419/reviews)** | [4.4 (14 ratings)](https://appshunter.io/ios/app/jb4-pro/id6746129072/reviews) |
| Number of ratings | **40** | 14 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 23 MB | 22 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Corporation Unitronic Inc](https://appshunter.io/developer/1693388679) | [Burger Motorsports, Inc](https://appshunter.io/developer/1815297026) |

## What reviewers say

### 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


### JB4 PRO

[App page](https://appshunter.io/ios/app/jb4-pro/id6746129072)

Integrate your performance tuner with your smartphone to adjust engine maps, view real-time data, and manage system settings. This app requires a specific Bluetooth adapter for full functionality.

**Highlights:** Change maps, Monitor live engine data, Record logs, Manage fault codes, Update JB4 firmware, Smartphone integration

**In-app purchases:** none


## Frequently asked questions

### Is UniE85 Manager free?

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

### Is JB4 PRO free?

JB4 PRO is free to download, with no in-app purchases.

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

UniE85 Manager is rated higher. UniE85 Manager averages 4.8 out of 5 from 40 ratings, while JB4 PRO averages 4.4 from 14 ratings.

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

Neither UniE85 Manager nor JB4 PRO shows ads.

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

UniE85 Manager ships an update every 2 months, and JB4 PRO every 2 weeks. Most recently, UniE85 Manager was updated on October 24, 2026 and JB4 PRO on October 30, 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.*