Sensitive Altimeter. This Android application measures air pressure using internal barometric sensor in the portable device and displays it on a three-pointer altitude indicator similar to the altimeter gauge in aircraft. Digital indication is also available.
It can take a long time. Some employers move very quickly, and others move very slowly. People have been hired three hours or three months (or more) after interviewing. Moreover, hiring nearly always takes longer than employers expect it will; you should generally double or triple whatever timeline they give you.
The amount of time from interview to job offer varies. For college grads, the National Association of Colleges and Employers (NACE) Recruiting Benchmarks Survey reports that, on average, employers hiring new college graduates may take 22.9 business days to extend a job offer after an interview.