The level level instrument is an instrument for controlling the angle and slope (horizontal, vertical, degrees,) of a given object relative to the ground. This is now available on smartphones. This version does not contain ads.
It is also called horizontal level, bubble level, bubble tube level or laser level. There are also digital levels. All carpenters use the spirit level.
It is used extensively, mainly in the field of civil engineering, construction, land surveying. This spirit level is very accurate.