GyLog
Camera Metadata Logger
Price history
About
This app records gyroscope and accelerometer data from your iPhone to create GCSV files. These files can be used for custom post-stabilization of your own iPhone footage or paired with footage from mirrorless or cinema cameras in Gyroflow.
What's New in GyLog
2.0.5
July 30, 2026
Mount angle values now match Gyroflow's Pitch and Roll fields directly when using an external camera, so you no longer need to swap them.
Subscriptions & In-App Purchases
GyLog Pro
iPhone motion logging for Gyroflow.
Developer apps
FAQ
What is GyLog used for?
GyLog is a motion data logger that records gyroscope and accelerometer data from your iPhone in GCSV format. This data is used for custom post-stabilization of video footage in Gyroflow, either for iPhone footage or footage from other cameras.
How does GyLog work with other cameras?
You can mount your iPhone on a mirrorless or cinema camera using a cold shoe adapter. GyLog then acts as a dedicated Gyroflow log recorder, capturing motion data that your camera might miss, allowing for advanced stabilization in post-production.
Does GyLog collect personal data?
No, GyLog prioritizes privacy. It does not collect any personal data. All recordings are stored locally on your device and are never uploaded to any server. Audio sync files are also stored locally and can be deleted at any time.
What is the GCSV format?
GCSV (Gyroflow CSV) is the standard format used by Gyroflow for external gyroscope data. GyLog outputs all 6 axes of motion data (3-axis gyroscope + 3-axis accelerometer) with nanosecond-precision timestamps, ensuring compatibility and accuracy for stabilization.
Can GyLog record in the background?
Yes, GyLog supports background motion logging. This means it can continue recording sensor data even when the screen is locked, ensuring you capture all necessary motion data without interruption.
What are the subscription options for GyLog?
GyLog offers a subscription plan called 'GyLog Pro' for $14.99 per year, which includes a 14-day free trial. This subscription likely unlocks advanced features or removes limitations present in the free version.
How often is GyLog updated?
The latest version of GyLog is 2.0.5, and it was last updated on July 30, 2026. This indicates a relatively active development cycle, suggesting ongoing improvements and bug fixes.
What devices does GyLog support?
GyLog is supported on iPhones. The app is rated for ages 4+ and is available for download.
