JB4 Mobile vs dragy·Lap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JB4 Mobile
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.
- Live gauge monitoring
- Data logging and graphing
- User adjustable settings
- WMI settings modification
- On-the-fly map switching
- Code reading and deletion
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The brand new JB4 Mobile application is finally ready for public release and has lots of great new features including: *Gauge theme customizations *Built-in raw CSV data viewer *Revamped User Adj./WMI data editors *New modern UI completely rewritten from the ground up *More seamless integration with our backend servers JB4 Connect Kit Users: 1) Install the Connect Kit per the installation guide for your vehicle 2) Create your account/sign in with this app 3) Ensure JB4 Mobile has all requested permissions 4) Tap the Connect button in JB4 Mobile About The App: JB4 Mobile is a mobile data logger and display for use with the JB4 tuner from Burger Motorsports. JB4 Mobile allows you to monitor and log multiple parameters from your JB4 equipped car. Parameters such as boost, rpm, fuel trims, air/fuel ratios, ignition advance and much more are available. Current Features: Live gauges Data logging Data graphing Log export via email Code reading/deletion Modify User Adj. (boost, fuel, etc.) settings Modify WMI settings Switch maps on the fly Auto WOT logging JB4 Firmware Updating JB4 ® is a registered trademark of Burger Motorsports Inc ® and is used with written permission.
dragy·Lap
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.
- 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
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Dragy Lap is a high‑performance GPS‑based next‑generation lap timer, compatible with Dragy Pro (25 Hz), Dragy DRG70/DRG70‑C (25 Hz), and Dragy DRG69 (10 Hz) device. Go to the track with real-time predictive laptiming. Dual camera recording, video overlay with speedometer, lap time and 3D map. Instantly share the best lap and moment to 3rd party social media. Get verified lap time on the leaderboard. Pair the App with your Dragy device to start performance tracking. Key Features: • Real-Time Predictive Lap Timing See live delta vs. reference lap while you drive, with precise timing up to 25Hz. • Dual Camera Video Recording & Overlay Record front and rear camera footage with overlays showing speed, G-force, lap times, and a dynamic 3D map. • GoPro & DJI OSMO Action Support Import GoPro or DJI OSMO Action 4 footage and automatically sync with GPS and performance data overlays. • 3D Track Replay Review your racing line and performance with interactive 3D replays. • Lap Tool & Comparison Compare laps in detail with side-by-side analysis tools. • VBO File Export Export your session data as a .vbo file for professional analysis in Circuit Tools or other software. • Leaderboard Submit your best lap times to the Dragy Lap Leaderboard and compete with racers worldwide. • Events Join special events and challenges with exclusive rankings and shared leaderboards. • Instant Social Sharing Create highlight cards and share directly to Instagram, Facebook, or WhatsApp. Ready to level up your laps? Download Dragy Lap today and discover what your vehicle—and you—can really do. **Note: Hardware Required: a Dragy device is required to use this App. Dragy is available on www.goDragy.com
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | JB4 Mobile | dragy·Lap |
|---|---|---|
| Price | $27.99 | Free — better |
| Rating | 3.8 (241 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 52.4% of reviews — better | 45.5% of reviews |
| Number of ratings | 241 — better | 3 |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #5 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 332 MB |
| Age rating | 4+ | 4+ |
| Developer | Dmac Mobile Developments, LLC | Harbin Qirui Technology Company With Limited Liability. |
Customer experience
JB4 Mobile
dragy·Lap
Bugs and requests
JB4 Mobile
Reported bugs
5 issues- App crashes
- Can't connect to server
- Mirrored/inverted display
- Compatibility issues with new iOS versions
- Trouble logging in
Requested features
5 requests- Add CarPlay support
- Allow customizing map names
- Add more gauge styling options
- Improve UI and layout
- Integrate with Apple Carplay
dragy·Lap
Not enough reviews yet to summarise bugs or requests.
In-app purchases
JB4 Mobile
No in-app purchases
dragy·Lap
No in-app purchases
