Comparison

Garrett Motion G vs SpeedOmeter SP

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

Head to head
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.

About

SpeedOmeter SP

This utility app accurately tracks your speed using your device's built-in capabilities. It offers features like a trip meter, average and max speed display, and total distance traveled. You can also set speed limit alarms and view road speed limits when available.

Highlights
  • Accurate speed calculation
  • Trip meter
  • Average and max speed display
  • Total distance traveled
  • Speed limit alarm
  • Road speed limit display
  • Choice of measurement units
Features
Read full description

Carefully developed to achieve the best accuracy possible. “SpeedOmeter” uses the build in device capabilities to calculate your speed accurately. There is a trip meter available in the main view and also some other nice features such as showing the average speed, the max speed and the total distance traveled while using the app. You can set a speed limit alarm whenever you like in the main screen. A banner showing the current road’s speed limits is displayed whenever available. The measurement units are of your choice (km or mi). You can use “SpeedOmeter” Free of charge. Enjoy using it and don’t forget, keep your eyes on the road…!

Screenshots

Garrett Motion G4 screens
SpeedOmeter SP4 screens

Verdict

The call

The clearest difference is in-app purchases: Garrett Motion G at none against SpeedOmeter SP's 1. Garrett Motion G also leads on ads (none vs shown). SpeedOmeter SP's advantage is update cadence (every 2 weeks vs every 4 months) and ratings volume (4 vs 1). On price and rating 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. SpeedOmeter SP sells 1 one-off in-app purchase. Garrett Motion G asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Garrett Motion G against 5.0 for SpeedOmeter SP. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

Garrett Motion G ships an update every 4 months, SpeedOmeter SP every 2 weeks. The most recent releases landed on June 6, 2026 and September 9, 2026 respectively.

Scorecard7 real differences · 2 level
Garrett Motion G versus SpeedOmeter SP: the parameters behind the verdict, then further details
ParameterGarrett Motion GSpeedOmeter SP
PriceFreeFree
Rating5.0 (1 ratings)5.0 (4 ratings)
Number of ratings14 — better
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.012.0 — better
Further details — not scored
Size6 MB67 MB
Age rating4+4+
DeveloperPerformance ElectronicsSpyridon Bousios

Customer experience

Garrett Motion G

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

SpeedOmeter SP

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Garrett Motion G

No in-app purchases

1 purchases

SpeedOmeter SP

One-time1
  • Remove ads$2.99

Questions

Is Garrett Motion G free?
Garrett Motion G is free to download, with no in-app purchases.
Is SpeedOmeter SP free?
SpeedOmeter SP is free to download, with in-app purchases available.
Which has better reviews, Garrett Motion G or SpeedOmeter SP?
Garrett Motion G and SpeedOmeter SP are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.
Do Garrett Motion G or SpeedOmeter SP have ads?
SpeedOmeter SP shows ads; Garrett Motion G does not.
Which is updated more often, Garrett Motion G or SpeedOmeter SP?
Garrett Motion G ships an update every 4 months, and SpeedOmeter SP every 2 weeks. Most recently, Garrett Motion G was updated on June 6, 2026 and SpeedOmeter SP on September 9, 2026.

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