# RaceChrono Pro vs JB4 PRO

The clearest difference is price: JB4 PRO at Free against RaceChrono Pro's $19.99. JB4 PRO also leads on in-app purchases (none vs 3) and update cadence (fortnightly vs monthly). RaceChrono Pro's advantage is rating (4.7 vs 4.4) and ratings volume (174 vs 14). On review sentiment, ads, device support and iOS requirement there is nothing between them.

JB4 PRO is free to download; RaceChrono Pro costs $19.99 up front. RaceChrono Pro sells 3 one-off in-app purchases. JB4 PRO asks for nothing beyond the download.

RaceChrono Pro holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: RaceChrono Pro has 174 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 57% of RaceChrono Pro's written reviews are positive against 50% of JB4 PRO's.

RaceChrono Pro ships an update monthly, JB4 PRO fortnightly. The most recent releases landed on September 25, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | RaceChrono Pro | JB4 PRO |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | **[4.7 (174 ratings)](https://appshunter.io/ios/app/racechrono-pro/id1129429340/reviews)** | [4.4 (14 ratings)](https://appshunter.io/ios/app/jb4-pro/id6746129072/reviews) |
| Number of ratings | **174** | 14 |
| Positive reviews | **57.4% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Freemium | **Free** |
| Best chart rank | **#16** | — |
| Size | 43 MB | 22 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RaceChrono Oy](https://appshunter.io/developer/1056547888) | [Burger Motorsports, Inc](https://appshunter.io/developer/1815297026) |

## What reviewers say

### RaceChrono Pro

[App page](https://appshunter.io/ios/app/racechrono-pro/id1129429340)

**Currently charting:** #16 Top Paid · Sports (US App Store)

This app serves as a comprehensive lap timer and data logger for motorsports, enabling users to record and analyze performance. It offers video recording with data overlays and supports a wide range of external GPS and OBD-II devices for enhanced accuracy.

**Highlights:** Lap timing with sectors and optimal lap, Track library with over 2600 pre-made tracks, Data analysis with synchronized graphs and maps, Predictive lap timing, Video recording with data overlay, Support for external GPS and OBD-II devices, Unlimited session length

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reference session 3 | $0.99 | one-time |
| Reference session 2 | $4.99 | one-time |
| Reference session 1 | $8.99 | one-time |


### 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 RaceChrono Pro free?

RaceChrono Pro costs $19.99, and also offers in-app purchases.

### Is JB4 PRO free?

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

### Which has better reviews, RaceChrono Pro or JB4 PRO?

RaceChrono Pro is rated higher. RaceChrono Pro averages 4.7 out of 5 from 174 ratings, while JB4 PRO averages 4.4 from 14 ratings.

### Do RaceChrono Pro or JB4 PRO have ads?

Neither RaceChrono Pro nor JB4 PRO shows ads.

### Which is updated more often, RaceChrono Pro or JB4 PRO?

RaceChrono Pro ships an update monthly, and JB4 PRO fortnightly. Most recently, RaceChrono Pro was updated on September 25, 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.*