Galaxy S3 have a barometer sensor, you can see air Pressure and even Altitude from it (when climbing ,ect).
This is my app "Barometer Plus", a simple and easy to use barometer app that has a lot of personalization and high quality graphic: http://forum.xda-developers.com/show....php?t=2437599
Phone: Samsung C100 > Nokia 6200 > Nokia 2600 > Motorola C380 > Motorola L7i > Samsung Galaxy Spica i5700 > Samsung Galaxy S2>IP4>Samsung Galaxy S4 | My Apps
Not everyone has supremely fast mobile data when on the go. And … more
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