# D vs JB4 PRO

The clearest difference is rating: JB4 PRO at 4.4 against D's 1.9. JB4 PRO also leads on review sentiment (50% vs 13%) and update cadence (fortnightly vs every 5 months). D's advantage is ratings volume (124 vs 14) and iOS requirement (11.0 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

JB4 PRO holds the better App Store score, 4.4 against 1.9. That said, the two scores are not equally well evidenced: D has 124 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 13% of D's written reviews are positive against 50% of JB4 PRO's.

D ships an update every 5 months, JB4 PRO fortnightly. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | D | JB4 PRO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.9 (124 ratings)](https://appshunter.io/ios/app/d-sport/id1169979276/reviews) | **[4.4 (14 ratings)](https://appshunter.io/ios/app/jb4-pro/id6746129072/reviews)** |
| Number of ratings | **124** | 14 |
| Positive reviews | 12.5% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 68 MB | 22 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dinan Corp](https://appshunter.io/developer/1036838407) | [Burger Motorsports, Inc](https://appshunter.io/developer/1815297026) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-sport/id1169979276)

Control your engine's performance with a connected tuner. Adjust boost levels for fuel efficiency or increased power, choosing from five distinct settings. Monitor real-time and peak boost pressure directly from your smartphone.

**Highlights:** Adjust engine boost levels, 5 power settings (Valet, Stock, Sport, Sport+, Race), Monitor live boost pressure, Monitor peak boost pressure, Control engine performance

**Features:** macOS Compatibility

**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 D free?

D 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, D or JB4 PRO?

JB4 PRO is rated higher. D averages 1.9 out of 5 from 124 ratings, while JB4 PRO averages 4.4 from 14 ratings.

### Do D or JB4 PRO have ads?

Neither D nor JB4 PRO shows ads.

### Which is updated more often, D or JB4 PRO?

D ships an update every 5 months, and JB4 PRO fortnightly. Most recently, D was updated on September 20, 2026 and JB4 PRO on September 13, 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.*