Apple’s iPhone 6 could contain a barometer and air pressure sensors, according to 9to5Mac. The report claims that new references within Xcode 6 and iOS 8 are dedicated to altitude tracking and will require new Apple hardware. It’s possible that altitude tracking abilities might be incorporated in the new iPads and iWatch, as well. Barometer hardware could track altitude more quickly and accurately than current altitude-measuring apps that work based on GPS and motion chips. References to ambient pressure tracking were also found within iOS 8, meaning that other air pressure sensors within new devices could alert users to changes in the weather.