This used to be a good app. No longer. First they started displaying ads, as others have noted. I stopped that (most of the time) by turning off Cellular data for the app. That stopped the ads when away from wi-fi, which is most of the time when I use this app. But now they have added cookies so they can track you, regardless of your cellular data status. I have deleted the app from my phone, since I have another one now without the annoyances and tracking.
BonoBob about Digital Altimeter FREE