LogLens

LogLens is an offline-first flight log analysis app for drone operators and UAS engineers.

Import PX4 ULog (.ulg) flight logs directly from the Files app, and get instant diagnostic analysis — no cloud, no accounts, no network required.

What LogLens does:

• Parses real PX4 ULog binary files on-device

• Runs deterministic diagnostic rules for battery health, GPS quality, vibration, estimator status, and failsafe events

• Displays a curated quicklook: health verdict, severity-coded findings with recommendations, event timeline, and charts (voltage, altitude, GPS satellites, flight modes)

• Generates polished HTML and PDF flight reports you can share with your team

• Stores everything locally — your logs never leave your device unless you explicitly export them

Built for:

• Drone operators and field test teams

• Robotics and UAS engineers

• Developers working with PX4 and open-source autopilot stacks

• Anyone who wants fast situational awareness from a flight log

Current format support:

• PX4 ULog (.ulg) — fully supported

• ArduPilot DataFlash (.bin) — sample data preview (full parser coming)

• MAVLink Telemetry (.tlog) — sample data preview (full parser coming)

Privacy is a feature: all processing happens on-device. No backend, no accounts, no tracking.