A free app for Android, by Tracking Apps Studio.

This application includes many tools for you to use in your daily life. You can find all the tools in the toolbox which is available in the app. You can use the tools for your daily work. You can measure the height of the wall, the distance between the wall and the floor, the floor level, the ceiling height, and the roof pitch.

Also, you can measure the area of the room, the volume of the room, the time taken by the sound to reach the ears, the speed of the sound, and the distance from the sound source to the ears.

The toolbox also includes many other tools which can be used for many purposes.