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.
Two weeks should be your limit, but even that is a long time to wait for a job offer that may or may not be made. If you know you want a candidate, then hop on it quick and offer them the job. Waiting may be the downfall of your hiring process.