Comparison

E vs Garrett Motion G

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

Head to head
About

E

This app connects wirelessly to an EFI system, allowing users to monitor engine data and adjust various settings like air-fuel ratios and ignition timing. It offers a setup wizard for initial calibration and advanced tuning options for performance optimization.

Highlights
  • Bluetooth ECU communication
  • Live tuning of ECU settings
  • Real-time engine and sensor data monitoring
  • Setup Wizard for base calibration
  • Advanced tuning functions
  • Diagnostic troubleshooting page
  • Vivid gauge displays
Features
Read full description

E-Tuner 4 is Edelbrock's latest exclusive iOS app for the Pro-Flo 4 and EZ Street EFI Systems. E-Tuner 4 communicates with your PF4 or EZ Street ECU via Bluetooth, so you can manage and live-tune a variety of ECU settings such as air-fuel ratios, ignition timing, idle speed, acceleration fuel, or cold start mixture as well as monitor engine and sensor data in real-time wirelessly from your iPhone or iPad. The E Tuner 4 Setup Wizard simplifies your Pro Flo 4 or EZ Street EFI setup by assisting you with selecting the proper base calibration for your specific application. All you need to know is the engine displacement (CID) and camshaft, and kit specifications, and you're good to go! E-Tuner 4 applies a solid base calibration so you can run the vehicle without having to change any tuning settings. But, if you'd like to make changes, E-Tuner 4 offers a selection of "Advanced Tuning" functions to help dial in your calibration and get the vehicle’s performance exactly where you want it. Whether you'd like to run a bit leaner while cruising for improved mileage, or advance timing for more performance, the Advanced Tuning section is there for you. A diagnostic page for troubleshooting purposes is also available. Once you're up and running, feel free to explore E-Tuner 4’s vivid gauge displays to monitor your engine's performance. Unlike other tuning hand-held combos, you can actually use your phone or tablet as a mini-dashboard once you're done tuning. You can also preview E-Tuner 4 without being connected to an Edelbrock EFI System by enabling "Demo Mode." This will allow you to access the app's main features, and interact with pages like the Setup Wizard, Advanced Tuning, and Gauge Displays to get a feel for how E-Tuner 4 functions. *** Warning! *** E-Tuner 4 is only compatible with the Edelbrock Pro-Flo 4 and EZ Street EFI Systems. It is NOT compatible with V1 E-Street, V2 E-Street, or Pro-Flo 3 EFI systems nor does it work with other Edelbrock Legacy EFI Systems. The E-Tuner 4 app supports all iPhones and iPads running iOS 16 and higher at this time. Please check back later for updates

About

Garrett Motion G

This free tool connects to a Bluetooth module to display turbo speed and boost pressure data on your mobile device. Optimize turbocharger durability and performance by monitoring operating RPMs and calculating turbo efficiency.

Highlights
  • Display turbo speed and boost pressure
  • Optimize turbocharger durability and performance
  • Calculate turbo efficiency
  • Gauge and graph data formats
  • 120-second live data plot
  • Easy installation and setup
Features
Read full description

The Garrett G-Smart mobile app is a free tool that allows the G-Smart Bluetooth module to convert Turbo Speed and Boost Pressure signals into wireless Bluetooth data for display on a mobile device. This important data will allow enthusiasts to see if they are operating the turbocharger within its recommended RPM limits to optimize durability and performance. Turbo efficiency and corrected air flow can be calculated when manifold absolute pressure (MAP) is known and this can help identify proper turbo selection. Kit Selection: Purchase of a Garrett G-Smart module is required to make this this mobile device application function. Garrett offers G-Smart kits with G-Series (flange style) and GTX (threaded) speed sensors. All kits include a wiring harness and Bluetooth module, with the option to purchase with or without a speed sensor (for enthusiasts with existing speed sensors). PN: 923586-0003 G-Smart Kit with Flange Speed Sensor (G-Series Models 25 30 35 40 42 45 47 50 55 57 | GTX Gen II Models 47 50 55) PN: 923586-0001 G-Smart Kit without Speed Sensor (Use if you have an existing speed sensor) PN: 923586-0002 G-Smart Kit with Threaded Speed Sensor (GTX Gen II Models 28 30 35 ) *For all other models without an existing speed sensor port including GT, GTX Gen I, GBC, GTW, a speed sensor port can be machined into the compressor housing to accept the threaded style speed sensor and G-Smart kit. Speed Sensor Installation Instructions: Please review the speed sensor installation instructions before installing any speed sensor. https://bit.ly/3rxBHjG Please review your turbocharger compressor housing before purchasing the G-Smart Module. If you have questions about selecting the correct kit, please contact your Garrett Distributor. Easy to Install and Setup The Garrett G-Smart Bluetooth module is easy to install and configure. Bluetooth functionality means no wires through the firewall for a quick, and clean installation. The plug-and-play harness accepts Garrett flange and threaded style speed sensors. A 12V switched power and sufficient ground connection are all you need to get started. The Sensor Setup menu is loaded with existing Garrett Turbocharger part numbers, models, compressor wheel blade counts and top-rated turbo speeds. Custom configurations can also be created for Garrett models without speed sensor ports or for non-Garrett turbochargers that utilize the same style speed sensors. Analyze Turbo Speed and Boost Pressure With the device paired and the car running, the mobile device screen will display turbo speed and boost pressure (if connected) in gauge and graph format. The gauge display features a constant live data feed and has a marker that freezes on peak turbo speed. The graph plot length axis can display up to 120 seconds of live data. The live data feed can be paused by pressing the pause button on the screen. This allows you to review data points within the plot length by touch and scroll within the graph. Data older than 120 seconds cannot be recalled. Review Performance Data The analysis of this important data will allow enthusiasts to see if they are operating the turbocharger within its recommended RPM limits to optimize durability and turbo performance. Turbo efficiency and corrected air flow can be calculated when manifold absolute pressure (MAP) is known and this can help identify proper turbo selection. WARNING The use of any turbocharger product above maximum turbocharger speed is at the owner’s risk and can result in damage and premature failure. To protect the turbocharger from overspeed when operating, a speed sensor can be installed into the compressor housing to monitor shaft speed.

Screenshots

E4 screens
Garrett Motion G4 screens

Verdict

The call

The clearest difference is rating: Garrett Motion G at 5.0 against E's 3.9. E's advantage is ratings volume (24 vs 1). On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Garrett Motion G holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: E has 24 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 24, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 8 level
E versus Garrett Motion G: the parameters behind the verdict, then further details
ParameterEGarrett Motion G
PriceFreeFree
Rating3.9 (24 ratings)5.0 (1 ratings) — better
Positive reviews46.2% of reviews—
Number of ratings24 — better1
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size51 MB6 MB
Age rating4+4+
DeveloperEdelbrock CorpPerformance Electronics

Customer experience

E

All ratings24 ratings
Positive66.7%
Neutral20.8%
Negative12.5%
Written reviews13 reviews
Positive46.2%
Neutral30.8%
Negative23.1%

Garrett Motion G

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

E

No in-app purchases

None

Garrett Motion G

No in-app purchases

Questions

Is E free?
E is free to download, with no in-app purchases.
Is Garrett Motion G free?
Garrett Motion G is free to download, with no in-app purchases.
Which has better reviews, E or Garrett Motion G?
Garrett Motion G is rated higher. E averages 3.9 out of 5 from 24 ratings, while Garrett Motion G averages 5.0 from 1 ratings.
Do E or Garrett Motion G have ads?
Neither E nor Garrett Motion G shows ads.
Which is updated more often, E or Garrett Motion G?
E ships an update every 4 months, and Garrett Motion G every 4 months. Most recently, E was updated on October 24, 2026 and Garrett Motion G on September 24, 2026.

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