Glitch - Faulty Sensors

A lot of people are reporting that the sensors in the iPhone 5S are wildly inaccurate. You can access a spirit level (Apple calls it an inclinometer) by swiping left in the Compass app, but it turns out that it’s not working correctly.
In fact, the compass, accelerometer, and gyroscope have also been malfunctioning for some people. The level of fault varies, but it does seem to be an issue that’s specific to the iPhone 5S.

http://i44.tinypic.com/63srio.jpg

Notice

(Editor’s Note by Jeffrey Van Camp: We have not had trouble with the sensors on our iPhone 5S, though we do experience occasional ticks in the parallax effect on the home screen, which moves the background of the phone to produce a 3D effect.)

Potential Solution:

Your only option right now is to take the iPhone 5S back to the Apple Store and ask for a replacement, but be warned, many customers who have done exactly that are reporting that their replacement iPhone 5S has the same issues. It’s not clear if this is a hardware or software fault. If it is software-related, we expect an update to fix it, but until Apple acknowledges the issue, it’s a mystery.