dragy·Lap vs JB4 PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
JB4 PRO
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.
- Change maps
- Monitor live engine data
- Record logs
- Manage fault codes
- Update JB4 firmware
- Smartphone integration
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Smart phone integration for your JB4 performance tuner to change maps, monitor live engine data, record logs, manage fault codes, update JB4 firmware, and much more! All JB4 systems sold from 2025+ use this new FREE app!
Screenshots
Verdict
The clearest difference is rating: dragy·Lap at 5.0 against JB4 PRO's 4.4. JB4 PRO's advantage is ratings volume (14 vs 1). On price, review sentiment, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
dragy·Lap holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: JB4 PRO has 14 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 45% of dragy·Lap's written reviews are positive against 50% of JB4 PRO's, so the app with the better star average is not the one people write more warmly about.
dragy·Lap ships an update fortnightly, JB4 PRO every 2 weeks. Both last shipped on October 30, 2026.
| Parameter | dragy·Lap | JB4 PRO |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.4 (14 ratings) |
| Positive reviews | 45.5% of reviews | 50.0% of reviews — better |
| Number of ratings | 1 | 14 — better |
| Update frequency | Fortnightly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 332 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Harbin Qirui Technology Company With Limited Liability. | Burger Motorsports, Inc |
Customer experience
dragy·Lap
JB4 PRO
In-app purchases
dragy·Lap
No in-app purchases
JB4 PRO
No in-app purchases
