Simple, Private, Powerful Virtual Flight Logging.

ButterLog is the desktop tool that automatically captures your simulator data. No accounts. No subscriptions. Your logs stay yours.

Download ButterLog Free View Sample Log
ButterLog Application Screenshot

Zero-Friction Logging

Why ButterLog is essential for serious sim pilots.

No Login Required

Just install and run. ButterLog works immediately with your simulator, capturing data locally.

Background Capture

Detects flight start and end automatically. Focus on flying, we handle the logging.

Standardized Format

Logs are saved in a widely compatible format (Garmin G1000 CSV) for easy external use and backup.

You Own Your Data. Period.

ButterLog is not a cloud service.

  • No Servers: We do not store, view, or process your flight history.
  • Local Storage: All log files reside securely on your local hard drive.
  • No Telemetry: The software does not send any flight data back to our servers.

You have full control to view, edit, backup, or delete your logs directly from the tool's installation folder.

log files

Ready for Feedback? Analyze Your Flying with flysto.net

Seamlessly export your logs for professional analysis and a beautiful UI.

  1. Select & Export logs within the ButterLog application.
  2. Upload the files to the secure flysto.net platform.
  3. Review detailed graphs, approach analysis, and a professional flying score.
Analysis
Go to flysto.net for Detailed Analysis Sample flight.

Get Started Now.

Download the latest version of ButterLog for Windows.

Download ButterLog