This app was mentioned in 5 comments, with an average of 1.60 upvotes
There is actually a nice app for this
https://play.google.com/store/apps/details?id=com.technoloid.barometer
Works the same way, but you know, you don't have to press all those long numbers everytime you want to check.
I was worried about mine, until I downloaded this app to check the water resistance:
https://play.google.com/store/apps/details?id=com.technoloid.barometer
https://play.google.com/store/apps/details?id=com.technoloid.barometer
You can use this app to test for waterproofing