Sonar Distance Meter description

Sonar Distance Meter measures and visualizes the distances of nearby objects by generating sound waves and interpreting their echoes.

Features
* Free distance meter
* Measures the distances of nearby objects in realtime
* Visualizes the results as a diagram

Instructions
1. Tap to start scanning
2. Move the device back and forth to identify the target's sonar echo
3. If necessary, move the device sidewards to escape interferences
4. Place the device at the desired position
5. Optionally, tap to hold results
6. Read measured distances
* Try both microphones via the settings menu
* Try different volume levels
* Don't cover the speaker or microphone
* For a first test, hold the device at about 1m distance in front of a wall