For testing VIO performance on Android phones.

This is an experimental vibe coding project, with 99% of the code generated by AI.

Progress

• [✔️] Basic code structure & initial UI
• [✔️] Sensor data preview display
• [✔️] Sensor data recording
• VIO code compiled for Android
• JNI interfaces implemented; VIO I/O integrated into app frontend
• VIO trajectory preview added to UI
• Real-time resource usage monitoring