# JB4 Mobile vs Garmin Catalyst™

The clearest difference is price: Garmin Catalyst™ at Free against JB4 Mobile's $27.99. Garmin Catalyst™ also leads on rating (4.8 vs 3.8) and review sentiment (80% vs 52%). JB4 Mobile's advantage is chart position (#3 vs unranked). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

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

Garmin Catalyst™ holds the better App Store score, 4.8 against 3.8. Both are backed by a comparable volume of ratings — 239 and 120 respectively. Written reviews point the same way: 52% of JB4 Mobile's written reviews are positive against 80% of Garmin Catalyst™'s.

JB4 Mobile ships an update every 3 months, Garmin Catalyst™ monthly. The most recent releases landed on October 15, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | JB4 Mobile | Garmin Catalyst™ |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | [3.8 (239 ratings)](https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews) | **[4.8 (120 ratings)](https://appshunter.io/ios/app/garmin-catalyst/id1603280610/reviews)** |
| Number of ratings | **239** | 120 |
| Positive reviews | 52.4% of reviews | **80.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Best chart rank | **#3** | — |
| Size | 24 MB | 220 MB |
| Requires iOS | **15.1** | 16.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786) | [Garmin](https://appshunter.io/developer/411046952) |

## What reviewers say

### JB4 Mobile

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

**Currently charting:** #3 Top Paid · Sports, #102 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


### Garmin Catalyst™

[App page](https://appshunter.io/ios/app/garmin-catalyst/id1603280610)

Access and analyze your motorsports performance data on your smartphone. Review lap times, session summaries, and driver profiles. Track annual driving activity and session weather conditions.

**Highlights:** Access performance data, View lap times, Session summaries, Customizable driver profiles, Track annual activity, Record weather conditions

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use interface
- 🚀 Great performance data
- 💡 Actionable driving insights
- 👍 Simple setup
- 👍 Great for track drivers

**What reviewers complain about**

- 🐛 Glitches when logging in
- 🐛 App just glitches
- 🐛 Loading is soooo slow
- 🐛 Not user friendly
- 🐛 Comparing to friends frequently fails

**Reported bugs**

- Everytime you try logging in the app just glitches anyways can’t even get logged in.
- Comparing to others frequently fails
- Compare to friend feature way to frequently fails with the message about the tracks not matching well enough despite being the same track on the same days even.
- New version is off
- It won’t let me compare the laps with other friends on the same day. Says lap not similar. Literally same day same track same session.

**Requested features**

- Option to select 1-5 laps for optimum view
- Watch reference videos side by side on the Catalyst
- Add video review on phone or iPad
- Allow moving videos to iCloud for review
- Ability to download in-car camera footage directly from device to app


## Frequently asked questions

### Is JB4 Mobile free?

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

### Is Garmin Catalyst™ free?

Garmin Catalyst™ is free to download, with no in-app purchases.

### Which has better reviews, JB4 Mobile or Garmin Catalyst™?

Garmin Catalyst™ is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while Garmin Catalyst™ averages 4.8 from 120 ratings.

### Do JB4 Mobile or Garmin Catalyst™ have ads?

Neither JB4 Mobile nor Garmin Catalyst™ shows ads.

### Which is updated more often, JB4 Mobile or Garmin Catalyst™?

JB4 Mobile ships an update every 3 months, and Garmin Catalyst™ monthly. Most recently, JB4 Mobile was updated on October 15, 2026 and Garmin Catalyst™ on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*