# JB4 Mobile vs Race Buddy

The clearest difference is price: Race Buddy at Free against JB4 Mobile's $27.99. Race Buddy also leads on update cadence (every 3 weeks vs every 3 months). JB4 Mobile's advantage is in-app purchases (none vs 8) and ratings volume (239 vs 13). On rating, ads and device support there is nothing between them.

Race Buddy is free to download; JB4 Mobile costs $27.99 up front. Race Buddy sells 8 in-app purchases, starting at $1.99 per month. JB4 Mobile asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.8 for JB4 Mobile against 3.8 for Race Buddy. That said, the two scores are not equally well evidenced: JB4 Mobile has 239 ratings behind it against 13, so its average is the more settled of the two. Written reviews are what separate them: 52% of JB4 Mobile's written reviews are positive against 43% of Race Buddy's.

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

## The numbers

| Metric | JB4 Mobile | Race Buddy |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | **[3.8 (239 ratings)](https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews)** | [3.8 (13 ratings)](https://appshunter.io/ios/app/race-buddy-lap-and-drag-timer/id1440030429/reviews) |
| Number of ratings | **239** | 13 |
| Positive reviews | **52.4% of reviews** | 42.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#2** | — |
| Size | 24 MB | 131 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786) | [Imperio](https://appshunter.io/developer/521569345) |

## What reviewers say

### JB4 Mobile

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

**Currently charting:** #2 Top Paid · Sports, #151 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


### Race Buddy

[App page](https://appshunter.io/ios/app/race-buddy-lap-and-drag-timer/id1440030429)

This app transforms your device into a professional racing performance analyzer. It offers GPS lap timing, drag racing measurements, and video data overlay for automotive enthusiasts. Track your performance, compare with others globally, and analyze your runs with detailed telemetry.

**Highlights:** Drag racing and acceleration testing, GPS lap timing with sector splits, Video recording with telemetry overlay, Density altitude calculations, Online leaderboards and community, Vehicle management profiles

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RaceBuddy Pro Monthly | $1.99 | per month |
| RaceBuddy Pro Monthly | $4.99 | per month |
| Drag & Laptimer PRO Monthly | $6.99 | per month |
| RaceBuddy Pro Annually | $8.99 | per year |
| RaceBuddy Pro Yearly | $19.99 | per year |
| Drag & Laptimer PRO Yearly | $49.99 | per year |
| RaceBuddy Lifetime PRO | $29.99 | one-time |
| Lifetime PRO | $89.99 | one-time |


## Frequently asked questions

### Is JB4 Mobile free?

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

### Is Race Buddy free?

Race Buddy is free to download, with in-app purchases available.

### Which has better reviews, JB4 Mobile or Race Buddy?

JB4 Mobile is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while Race Buddy averages 3.8 from 13 ratings.

### Do JB4 Mobile or Race Buddy have ads?

Neither JB4 Mobile nor Race Buddy shows ads.

### Which is updated more often, JB4 Mobile or Race Buddy?

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