Here is a simple application that shows you the current atmospheric pressure. This accurate measuring tool (portrait orientation Android 6 or newer) works on the tablets phones and smartphones that are connected to the Internet (even if they do not have a built-in pressure sensor). You can use Barometer to track the changes in local pressure (as they indicate the weather trend) and to see some other important meteorological parameters.

Features:

-- two of the most used units of measurement can be selected (hPa-mbar and mmHg)
-- free application - no ads no limitations
-- only one permission is required (Location)
-- this app keeps the phone's screen ON
-- altitude information and location data
-- additional weather info are available (temperature cloudiness visibility etc.)
-- pressure calibration