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.
That being said, a typical time-to-fill goal for a position is 45 days from the time the job is posted to when the selected candidate starts on the job. This typically means 2-3 weeks to review candidates, 2 weeks to interview, and another 2 weeks for the selected candidate to give notice and start. Of course, this can vary, but this is a goal that most recruiting organizations target.