Comparison

JB4 Mobile vs POWER TUNER App

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
Currently charting
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

POWER TUNER App

Optimize your Yamaha motorcycle's performance for racing. Adjust engine and suspension settings, monitor real-time machine data, and track lap times. Features include mapping, traction control, launch control, and an ECU lock for theft deterrence.

Highlights
  • Engine and suspension tuning
  • Real-time machine data monitoring
  • Lap time tracking
  • Traction and launch control
  • ECU lock for theft deterrence
  • Setup guide
Features
Read full description

■ Introduction To win races, it is absolutely essential to set up your machine to best suit both you and the track conditions. To facilitate this, Yamaha Motors has developed the PowerTuner app for the Yamaha YZ series and WR series (*1). You can now quickly and easily adjust engine and suspension settings using the app to best suit every rider and any conditions. In PowerTuner, all features are available at no additional cost! Want to set up the machine to run faster? ⇒ Intuitive and easy settings. More detailed settings are also available. Make settings as per your choice by referring to the setup guide! Want to check the recorded usage information such as speed, throttle opening, engine speed, fuel consumption? ⇒ You can now use your smartphone as a machine information monitor! Want to check how much your lap time improves after customizing the machine settings in the app? ⇒ Measure your times lap-by-lap with the connected button on the machine! (*1) Depending on the machine, some functions may not be available. ■ Description ・Mapping There are three setting types: (1) Fuel Injection (FI) and Ignition (IG) Intuitive and easy adjustment by selecting "Smooth ⇔ Aggressive". If you want more detailed settings, you can adjust each with 16 points (4 x 4) according to the engine speed / throttle opening. (2) Traction Control Adjust the level of intervention within 3–4 levels. (3) Launch Control Set the "Rev limit" for launches. ・Monitor The race log, failure diagnostics, machine status, vehicle speed, throttle opening, engine speed, fuel consumption, water temperature, intake air temperature, and battery voltage are displayed on the smartphone. ・Lap timer (Time) Measure lap times with “Multi-function Button” on the left handlebar. After, check the data recorded by the machine's CCU on your smartphone. Since lap-by-lap measurement is available, you can numerically check the settings effect and lap time discrepancies in actual races. ・Set Up A FAQ-style setup guide is available for engine and suspension settings. Since it is easy to check the setting instructions on your smartphone, anyone can easily setup the engine and suspension. ・ECU Lock ECU Lock is a theft deterrent feature that, when engaged, prevents the engine from being started. ■ Supported environment: ・This app requires a smartphone. ・It is not guaranteed that the app will work with all devices. ■ Precautions: ・Use this app safely in compliance with all traffic rules and regulations. ・Only use it when the machine is parked in a safe place. ・It is not guaranteed that this app will work with all machines. CCU installation location and installation method may affect accuracy, sensitivity, and operation of the CCU. ・Some functions of this app require an internet connection through mobile data communication or wireless LAN. ・It is not guaranteed that the figures displayed on this app are accurate. ■ Inquiries ・This app can be used with some Yamaha machines. For inquiries, contact Yamaha dealer.

Screenshots

JB4 Mobile4 screens
POWER TUNER App4 screens

Verdict

The call

The clearest difference is price: POWER TUNER App at Free against JB4 Mobile's $27.99. JB4 Mobile's advantage is rating (3.8 vs 3.1) and review sentiment (52% vs 27%). On ratings volume, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

POWER TUNER App 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

JB4 Mobile holds the better App Store score, 3.8 against 3.1. Both are backed by a comparable volume of ratings — 239 and 80 respectively. Written reviews point the same way: 52% of JB4 Mobile's written reviews are positive against 27% of POWER TUNER App's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

Scorecard5 real differences · 6 level
JB4 Mobile versus POWER TUNER App: the parameters behind the verdict, then further details
ParameterJB4 MobilePOWER TUNER App
Price$27.99Free — better
Rating3.8 (239 ratings) — better3.1 (80 ratings)
Positive reviews52.4% of reviews — better26.6% of reviews
Number of ratings239 — better80
Update frequencyEvery 3 monthsEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#3 — better—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.0
Further details — not scored
Size24 MB14 MB
Age rating4+4+
DeveloperDmac Mobile Developments, LLCYamaha Motor Co., Ltd.

Customer experience

JB4 Mobile

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

POWER TUNER App

All ratings80 ratings
Positive46.3%
Neutral12.5%
Negative41.3%
Written reviews79 reviews
Positive26.6%
Neutral15.2%
Negative58.2%

User reviews

JB4 Mobile

From 239 App Store ratings

What we love

  • 🚀 Great app and a must have with the JB4
  • 🔒 Robust security features
  • 👍 Awesome data logging
  • 👍 Incredible Support
  • 👍 Works as expected

Room to improve

  • 🐛 Doesn't work properly, screen upside down and backwards
  • 🐛 Stopped working after update
  • 🐛 Bluetooth connection issues
  • 🐛 Gauges freezing
  • 🐛 Screen turns off

POWER TUNER App

From 80 App Store ratings

What we love

  • 👍 Easy to use for tuning
  • 💡 Comprehensive maintenance log
  • 🚀 FI/IG tuning is amazing
  • 👍 App is great when it works
  • 👍 Adjustability is amazing

Room to improve

  • 🐛 Freezing/crashing in menus
  • 🐛 Connectivity issues
  • 🐛 App not working with iOS 14
  • 🐛 ECU lock greyed out
  • 🐛 No power tuning for WR450F

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

POWER TUNER App

Reported bugs

37 issues
  • FI/IG tuning menu freezes
  • ECU lock greyed out and shows error message
  • App freezes when accessing maps sub menu
  • Mapping edit screen is unresponsive
  • Cannot connect to WiFi/bike after 120 hours
Show 32 more
  • App crashes when downloading maps from Yamaha
  • Hour meter resets when bike is turned off
  • App not working with iOS 14
  • Cannot inject maps downloaded from Yamaha site on iOS
  • Cannot connect to bike on iPhone with iOS 14
  • App shows no data and won't connect to bike with iOS 14
  • Bike will not connect with app, shows no internet service
  • Cannot change maps, see hours on iOS 14.2
  • App quits working after new iOS updates
  • Cannot sync with 2020 YZ450F since iOS 14 update
  • Cannot change maps since new iOS update
  • App won't connect due to iOS 14
  • Cannot connect to 2021 250f
  • Does not work with iOS 14
  • Cannot connect to 2020 YZ450F since phone update
  • App shows no data and won't connect to bike with iOS 14
  • App doesn't work with iOS 14
  • No funciona con IOS14 en iPhone XS
  • App won't connect due to iOS 14
  • Unable to connect to 2020 YZ450F since phone update
  • App shows no data and won't connect to bike with iOS 14
  • App doesn't work with iOS 14
  • App works great but does NOT help start 2020 250FX
  • Issue with sending/receiving maps
  • Cannot import map to vehicle
  • Maps download to phone but won't transfer to app
  • Cannot send or receive maps on new iPhone
  • App does not register bike, requires re-selection on opening
  • Phone crashes when importing maps from Yamaha website
  • App will not save bike on iPhone
  • Cannot get bike to bring up WiFi on phone
  • Display is sometimes jerky

Requested features

14 requests
  • Add Russian language support
  • Add Portuguese language support
  • Add Spanish language support
  • Add French language support
  • Add Chinese language support
Show 9 more
  • Add ability to lock bike
  • Change KMH to MPH and Celsius to Fahrenheit
  • Record GPS data with throttle/RPM overlay
  • Start bike via app
  • Digital RPM readout option
  • Simple view with sliders for tuning
  • Add more service log entries
  • Make maps available in a manual within the app
  • Improve connection between app and smartphone

In-app purchases

None

JB4 Mobile

No in-app purchases

None

POWER TUNER App

No in-app purchases

Questions

Is JB4 Mobile free?
JB4 Mobile costs $27.99, with no in-app purchases.
Is POWER TUNER App free?
POWER TUNER App is free to download, with no in-app purchases.
Which has better reviews, JB4 Mobile or POWER TUNER App?
JB4 Mobile is rated higher. JB4 Mobile averages 3.8 out of 5 from 239 ratings, while POWER TUNER App averages 3.1 from 80 ratings.
Do JB4 Mobile or POWER TUNER App have ads?
Neither JB4 Mobile nor POWER TUNER App shows ads.
Which is updated more often, JB4 Mobile or POWER TUNER App?
JB4 Mobile ships an update every 3 months, and POWER TUNER App every 3 months. Most recently, JB4 Mobile was updated on September 23, 2026 and POWER TUNER App on September 24, 2026.

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