Altitude is totally unreliable and is never correct. For example Amsterdam is not 48 meters above sea level. Also the location is not accurate, I am not near Amsterdam. [Edit] Standing in the middle of a park in Leiderdorp, 46 meters. Actual altitude is just above sea level. I have recently walked 340km in Portugal and Spain, the altitude was never anywhere near correct. The app has been used on S21 ultra and Pixel 10 pro. Both phones show the wrong altitude. [End edit]
Developer reply
Altitude is directly read from your phone GPS, our app just displays it. And that is not your location, it is your timezone. The exact location we used can be seen if you tap on the small GPS icon. Considering these, please give us a fair rating. Microsys Team