Does the app drain device battery?

Yes, the app drains device battery but not that much since we have developed an algorithm to manage this. When the app is not opened or running in the background, the accuracy of GPS is not as high as it is when the app is opened. So the app does not drain much battery.

If the device is not showing the battery level, you can log out of the app and log back in, and ensure that the app is updated to its latest version.