Comparison

JB4 Mobile vs Dragline

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Live gauge monitoring
  • Data logging and graphing
  • User adjustable settings
  • WMI settings modification
  • On-the-fly map switching
  • Code reading and deletion
Features
Read full description

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.

About

Dragline

This app automatically detects and times drag racing segments with high precision using GPS and accelerometer data. It allows users to track top speeds, compete on global leaderboards, and share their performance stats.

Highlights
  • Automatic drag racing segment timing
  • GPS-blended accuracy
  • Top speed tracking
  • Real-time roll race mode
  • Global leaderboards
  • Personal best tracking
  • Car build sharing
Features
Read full description

Dragline is a precision drag racing timer for iPhone and Apple CarPlay – built for drivers who want real performance data without the bulk of dedicated hardware. Arm the app, launch your car, and Dragline automatically detects your run and times every segment with GPS-blended accuracy. No buttons to press mid-run, no setup required. TIMING Measure 0-30, 30-60, 60-120, and quarter-mile times with high precision. Automatic launch detection starts the timer the moment your car moves – delivering consistent, repeatable results run after run. GPS speed blending and accelerometer fusion give you results comparable to dedicated timing devices. Enable Top Speed tracking to capture your peak speed on every run. TOP SPEED Track your highest speed hit during any session. Top Speed is recorded alongside your segment times, displayed on your profile, and has its own All Time and This Week leaderboard so you can compete on every metric that matters. RACE MODE Challenge your crew to a real-time roll race – no cones, no spotter, no guesswork. Create a room, share a 4-digit code, and get up to 4 drivers synced and ready. Set your start and finish speeds, hold your speed in the window, and the countdown fires automatically when everyone's locked in. Synchronized start across all devices. Results are instant. LEADERBOARD Compete globally on both All Time and This Week leaderboards. Post your best times for each segment individually – your 0-30, 30-60, 60-120, quarter-mile, and top speed are ranked separately so every metric counts. Weekly leaderboards reset every Sunday, giving every driver a fresh shot at the top. Filter by car to see how your specific build stacks up against similar vehicles worldwide. PERSONAL BESTS Your Recap tab tracks your all time and this week bests for every segment. See exactly where you stand, what's already been posted to the leaderboard, and which times are ready to submit. All Time and This Week bests are displayed side by side, so you always have the full picture at a glance. GARAGE Browse builds from drivers around the world. See their car specs, modifications, photos, and best 0-60 times. Post your own build with photos and a full mod list, like and comment on other builds, and show the community what you're working with. The Garage is where performance meets culture. SHARE YOUR RUNS Every run you record can be shared as a professionally styled stats card – showing your segment times, car info, and run date in a clean, minimal layout. Choose exactly which runs to share and send them anywhere – Instagram stories, iMessage, Twitter, or any platform you use to show off your build. Whether it's a personal best or just a clean pull, your results look the way they deserve to. RUN HISTORY Every session is automatically saved with your car details and a timestamp, building a complete log of your performance over time. Scroll back through every run, track your improvement, and always know your best. APPLE CARPLAY Full CarPlay support means your times are displayed right on your dash – no need to glance at your phone mid-session. Stay focused on the road while Dragline handles the data. DRIVER PROFILE Set up your driver name and car info once and it follows you everywhere in the app. Your username and vehicle appear on every leaderboard entry so other drivers know exactly who they're racing against. Challenge friends directly from your profile by sharing your best times and inviting them to beat you. BUILT FOR PERFORMANCE Dragline is designed for drivers who take their builds seriously. Whether you're chasing a personal best, competing on the weekly leaderboard, showing off your build in the Garage, documenting a clean run to share with your crew, or lining up against your friends in Race Mode – Dragline gives you the tools to do it right. Dragline is designed for closed courses, racetracks, and private roads only. Always follow local laws and never use timing features on public roads.

Screenshots

JB4 Mobile4 screens
Dragline4 screens

Verdict

The call

The clearest difference is review sentiment: Dragline at 100% against JB4 Mobile's 52%. Dragline also leads on price (Free vs $27.99) and rating (5.0 vs 3.8). JB4 Mobile's advantage is ratings volume (239 vs 4) and chart position (#3 vs unranked). On update cadence, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Dragline holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: JB4 Mobile has 239 ratings behind it against 4, 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 100% of Dragline's.

UpkeepUpdate frequency

JB4 Mobile ships an update every 3 months, Dragline every 6 weeks. The most recent releases landed on October 15, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 5 level
JB4 Mobile versus Dragline: the parameters behind the verdict, then further details
ParameterJB4 MobileDragline
Price$27.99Free — better
Rating3.8 (239 ratings)5.0 (4 ratings) — better
Positive reviews52.4% of reviews100.0% of reviews — better
Number of ratings239 — better4
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#3 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.2
Further details — not scored
Size24 MB20 MB
Age rating4+12+
DeveloperDmac Mobile Developments, LLCSAMARTH SHAH

Customer experience

JB4 Mobile

All ratings239 ratings
Positive66.9%
Neutral12.1%
Negative20.9%
Written reviews145 reviews
Positive52.4%
Neutral13.1%
Negative34.5%

Dragline

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Dragline

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

JB4 Mobile

No in-app purchases

None

Dragline

No in-app purchases

Questions

Is JB4 Mobile free?
JB4 Mobile costs $27.99, with no in-app purchases.
Is Dragline free?
Dragline is free to download, with no in-app purchases.
Which has better reviews, JB4 Mobile or Dragline?
Dragline is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while Dragline averages 5.0 from 4 ratings.
Do JB4 Mobile or Dragline have ads?
Neither JB4 Mobile nor Dragline shows ads.
Which is updated more often, JB4 Mobile or Dragline?
JB4 Mobile ships an update every 3 months, and Dragline every 6 weeks. Most recently, JB4 Mobile was updated on October 15, 2026 and Dragline on September 24, 2026.

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