# JB4 Mobile vs dragy·Lap

The clearest difference is price: dragy·Lap at Free against JB4 Mobile's $27.99. dragy·Lap also leads on update cadence (fortnightly vs every 3 months). JB4 Mobile's advantage is ratings volume (241 vs 3) and chart position (#5 vs unranked). On rating, review sentiment, ads and in-app purchases there is nothing between them.

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

JB4 Mobile holds the better App Store score, 3.8 against 3.7. That said, the two scores are not equally well evidenced: JB4 Mobile has 241 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 52% of JB4 Mobile's written reviews are positive against 45% of dragy·Lap's.

JB4 Mobile ships an update every 3 months, dragy·Lap fortnightly. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | JB4 Mobile | dragy·Lap |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | **[3.8 (241 ratings)](https://appshunter.io/ios/app/jb4-mobile/id794841332/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/dragylap-new-gps-lap-timer/id1617703369/reviews) |
| Number of ratings | **241** | 3 |
| Positive reviews | **52.4% of reviews** | 45.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Best chart rank | **#5** | — |
| Size | 24 MB | 332 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmac Mobile Developments, LLC](https://appshunter.io/developer/372235786) | [Harbin Qirui Technology Company With Limited Liability.](https://appshunter.io/developer/1260905447) |

## What reviewers say

### JB4 Mobile

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

**Currently charting:** #5 Top Paid · Sports (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


### dragy·Lap

[App page](https://appshunter.io/ios/app/dragylap-new-gps-lap-timer/id1617703369)

This app acts as a next-generation GPS lap timer, compatible with various Dragy devices. It offers real-time predictive lap timing, dual-camera video recording with data overlays, and detailed analysis tools. Compete on leaderboards and share your best laps instantly.

**Highlights:** Real-time predictive lap timing, Dual camera video recording & overlay, GoPro & DJI OSMO Action support, 3D track replay, Lap comparison tools, VBO file export, Global leaderboard

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is JB4 Mobile free?

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

### Is dragy·Lap free?

dragy·Lap is free to download, with no in-app purchases.

### Which has better reviews, JB4 Mobile or dragy·Lap?

JB4 Mobile is rated higher. JB4 Mobile averages 3.8 out of 5 from 241 ratings, while dragy·Lap averages 3.7 from 3 ratings.

### Do JB4 Mobile or dragy·Lap have ads?

Neither JB4 Mobile nor dragy·Lap shows ads.

### Which is updated more often, JB4 Mobile or dragy·Lap?

JB4 Mobile ships an update every 3 months, and dragy·Lap fortnightly. Most recently, JB4 Mobile was updated on November 6, 2026 and dragy·Lap on November 7, 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.*