Comparison

G vs Watch Sensor Logger

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

Head to head
About

G

This app records and analyzes motion data from your device's sensors, including acceleration, rotation, and GPS information. It's designed for experiments, performance analysis, and tracking various movements. Data can be exported in CSV format and is resistant to loss.

Highlights
  • Logs and plots motion data (acceleration, rotation)
  • Records ground speed, altitude, distance, and displacement
  • Virtually unlimited recording time
  • Programmable data acquisition control
  • Remote control via Apple Watch
  • Configurable acceleration reference frame
  • Export data in CSV format
Read full description

G-Field Recorder is an easy-to-use and powerful data acquisition and analysis system for iOS device deployments. G-Field Recorder logs, plots, and replays: - 3-axis acceleration fields - 3-axis rotational displacements - Ground speed - Altitude - Distance - Displacement - Course Use this app to assist your analysis of experiments, sports performance, drone behaviors, land vehicle and watercraft actions, security applications, structural behaviors, and more. All of your data is logged on your device, where you may retain it indefinitely, share, or delete the files of your choosing. All data files are easy to export in CSV format via AirDrop and other methods (e.g. Slack, email, LinkedIn ...) available on your device. Developed for NASA payloads, G-Field Recorder is resistant to data loss from impacts, continuously saving your data to permanent storage in case of a severe upset event that damages your device (e.g. you crash your drone). Features: - Logs and plots of motion data: -- 3 Axis Acceleration Field -- 3 Axis Rotations (Pitch, Roll, and Yaw) - Virtually unlimited recording time.  The collected data is automatically stored in as many sequentially indexed files as required, up to about 5 MB per file (for easy search and review). Data storage capability is up to the max storage availability on the device. - Programmable data acquisition control:  - Relative start time  - Absolute start time - Relative stop time - Acceleration reference frame is configurable: -Choose to ignore or sense gravity - Select reference frames: Proper, Fictitious, or Coordinate acceleration - Remote control and monitoring via Apple Watch: - Apple Watch can start and stop data collection, overriding any device-programmed start and stop times  - Apple Watch can set the acceleration reference frame - Set sampling frequency from vanishingly small (e.g. 0.001 Hz) up to 100 Hz - Computed averages and extrema of are automatically logged for all recorded motion data - Rewind and instant playback of recorded data - Text notes and an image can be added to each stored data file - Selectable animated icon graphics GPS Package In-App Purchase (recommended ) -- Ground Speed, Course, Altitude -- Distance & Displacement -- Illustrated path overlayed on Apple Map

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

Screenshots

G4 screens
Watch Sensor Logger4 screens

Verdict

The call

The clearest difference is rating: Watch Sensor Logger at 5.0 against G's 3.7. Watch Sensor Logger also leads on in-app purchases (none vs 2). G's advantage is ads (none vs shown) and update cadence (every 4 days vs every 25 months). On price, review sentiment 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. G sells 2 one-off in-app purchases. Watch Sensor Logger asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Watch Sensor Logger holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: G has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 50% and 50% positive.

UpkeepUpdate frequency

G ships an update every 4 days, Watch Sensor Logger every 25 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

Scorecard7 real differences · 3 level
G versus Watch Sensor Logger: the parameters behind the verdict, then further details
ParameterGWatch Sensor Logger
PriceFreeFree
Rating3.7 (9 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews50.0% of reviews
Number of ratings9 — better1
Update frequencyEvery 4 days — betterEvery 25 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, Apple Watch
Requires iOS14.7 — better17.0
Further details — not scored
Size35 MB17 MB
Age rating4+4+
DeveloperStratos Perception, LLCyuya kanbetsunawa

Customer experience

G

All ratings7 ratings
Positive71.4%
Neutral0.0%
Negative28.6%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Watch Sensor Logger

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

In-app purchases

2 purchases

G

One-time2
  • Multi-Plot$0.99
  • Professional$3.99
None

Watch Sensor Logger

No in-app purchases

Questions

Is G free?
G is free to download, with in-app purchases available.
Is Watch Sensor Logger free?
Watch Sensor Logger is free to download, with no in-app purchases.
Which has better reviews, G or Watch Sensor Logger?
Watch Sensor Logger is rated higher. G averages 3.7 out of 5 from 9 ratings, while Watch Sensor Logger averages 5.0 from 1 ratings.
Do G or Watch Sensor Logger have ads?
Watch Sensor Logger shows ads; G does not.
Which is updated more often, G or Watch Sensor Logger?
G ships an update every 4 days, and Watch Sensor Logger every 25 months. Most recently, G was updated on October 24, 2026 and Watch Sensor Logger on October 21, 2026.

Other comparisons