Comparison

Watch Sensor Logger 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

Watch Sensor Logger

Log detailed motion and GPS data from your Apple Watch. Export sensor readings like acceleration, attitude, and location as a CSV file for analysis. This app is exclusively designed for Apple Watch.

Highlights
  • Log sensor data
  • GPS tracking
  • Export to CSV
  • Acceleration logging
  • Attitude data
  • Time stamping
Features
Read full description

Watch Sensor Logger turns your Apple Watch into a powerful motion and location logger. Record high-precision sensor data straight from your wrist: • Acceleration • Rotation Rate • Gravity • Attitude • GPS location Start a recording on your Apple Watch, then review your sessions on your iPhone. Every measurement is visualized with clear charts so you can spot patterns at a glance, and you can export any session as a CSV file for analysis in your favorite tools. Perfect for researchers, developers, athletes, and anyone curious about the motion of everyday life. KEY FEATURES • One-tap recording on Apple Watch • Motion sensors: acceleration, rotation rate, gravity, attitude • GPS location logging • Beautiful charts to explore your data • CSV export for spreadsheets and analysis • Manage and delete past sessions easily

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

Watch Sensor Logger4 screens
Garrett Motion G4 screens

Verdict

The call

The clearest difference is ads: Garrett Motion G at none against Watch Sensor Logger's shown. Garrett Motion G also leads on update cadence (every 4 months vs every 25 months) and iOS requirement (15.0 vs 17.0). On price, in-app purchases, monetization model and device support 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.

UpkeepUpdate frequency

Watch Sensor Logger ships an update every 25 months, Garrett Motion G every 4 months. The most recent releases landed on August 8, 2026 and June 6, 2026 respectively.

Scorecard3 real differences · 7 level
Watch Sensor Logger versus Garrett Motion G: the parameters behind the verdict, then further details
ParameterWatch Sensor LoggerGarrett Motion G
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 25 monthsEvery 4 months — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size17 MB6 MB
Age rating4+4+
Developeryuya kanbetsunawaPerformance Electronics

Customer experience

Watch Sensor Logger

Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Garrett Motion G

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

In-app purchases

None

Watch Sensor Logger

No in-app purchases

None

Garrett Motion G

No in-app purchases

Questions

Is Watch Sensor Logger free?
Watch Sensor Logger 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.
Do Watch Sensor Logger or Garrett Motion G have ads?
Watch Sensor Logger shows ads; Garrett Motion G does not.
Which is updated more often, Watch Sensor Logger or Garrett Motion G?
Watch Sensor Logger ships an update every 25 months, and Garrett Motion G every 4 months. Most recently, Watch Sensor Logger was updated on August 8, 2026 and Garrett Motion G on June 6, 2026.

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