# GyLog - Gyro Data Logger — Stabilize video with gyro data

> Motion data logger for Gyroflow stabilization, recording sensor data in GCSV format. (iPhone/iPad app by Kumo, Inc..)

- Source: https://appshunter.io/ios/app/gylog-gyro-data-logger/id6759689665 (this page in markdown: same URL + `.md`)
- Developer: [Kumo, Inc.](https://appshunter.io/developer/955162378)
- Category: Photo & Video, Utilities
- Price: Free with in-app purchases
- Rating: 1.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.5 · 7 MB
- Languages: American English
- Released: 2026-03-04
- Data updated: 2026-11-05
- Monetization: free with in-app purchases

## What is GyLog?

GyLog is a motion data logger for Gyroflow stabilization. Record gyroscope 
and accelerometer data from your iPhone's sensors in GCSV format — for custom 
post-stabilization of your own iPhone footage, or for pairing with any 
mirrorless or cinema camera.

TWO WAYS TO USE

With your iPhone — While iPhone Action Mode and LOG bring built-in stabilization, 
GyLog hands the control back to you. Stabilize in Gyroflow with your own 
smoothness, cropping, and rolling-shutter settings — beyond what automatic 
processing decides for you.

With a mirrorless or cinema camera — Mount your iPhone on any camera with a 
cold shoe adapter. GyLog turns your iPhone into a dedicated Gyroflow log 
recorder, capturing the motion your camera can't, so you can stabilize its 
footage in post.

KEY FEATURES
• GCSV format — directly compatible with Gyroflow
• Background motion logging — keeps recording even when screen is locked
• Mount angle calibration — automatically detects phone orientation
• Audio sync backup — optional low-bitrate audio track for drift correction
• High sampling rate — up to ~100 Hz on supported devices
• File management — filter, select, share, and delete recordings
• AirDrop & Files app — easily export logs to your Mac for processing

PRIVACY FIRST
GyLog 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 
stored locally and can be deleted at any time.

HOW IT WORKS
1. Mount your iPhone on your camera, or hold it while shooting iPhone video
2. Tap "Calibrate Mount" to detect the phone angle
3. Press Start and begin filming
4. When done, export the GCSV file to your Mac
5. Import into Gyroflow for custom post-stabilization

ABOUT 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.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Record gyroscope and accelerometer data
- GCSV format compatible with Gyroflow
- Background motion logging
- Mount angle calibration
- Audio sync backup
- High sampling rate up to ~100 Hz
- Easy file management and export

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| GyLog Pro | $14.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| GyLog Pro Lifetime | $29.99 | one-time |


## Is GyLog safe?

Not enough ratings yet to assess GyLog.

## Is GyLog legit?

GyLog - Gyro Data Logger has limited verification signals. The AppsHunter Legitimacy Score for GyLog is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about GyLog

### 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.

## Version history (last 5 releases)

### 2.0.6 — 2026-11-01

Updated App Store details. No changes to recording or files.

### 2.0.5 — 2026-07-30

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.

### 2.0.5 — 2026-07-30

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.

### 2.0.4 — 2026-07-16

Adds a lifetime purchase option for GyLog Pro while keeping the existing annual subscription with a 14-day free trial.

### 2.0.3 — 2026-07-01

Adds a lifetime purchase option for GyLog Pro while keeping the existing annual subscription with a 14-day free trial.

## More apps by Kumo, Inc.

- [Pocket Log Camera](https://appshunter.io/ios/app/pocket-log-camera/id6781481870)

All apps by Kumo, Inc.: https://appshunter.io/developer/955162378

## Related topics

[gyroflow](https://appshunter.io/ios/topics/gyroflow)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-05.*