Here is a simple application that shows you the current value of the atmospheric pressure. This accurate measuring tool (portrait orientation, Android 5 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 the barometer to track the changes in local pressure (as they indicate the weather trend) and to see some other important meteorological parameters.
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;
additional weather info are available (temperature, cloudiness, visibility);