Most apps using "NASA" in the title are not official NASA products; they use the name to suggest scientific accuracy or to reference the public-domain satellite maps they use for the background.
No satellite “scans for metal” the way a handheld metal detector does. Instead, scientists use to guess where metal deposits might exist based on magnetic fields (magnetometry) or gravity anomalies.
These tools can show you historical mining districts, fault lines, and surface mineralogy. Combine that with a real metal detector for a legitimate treasure hunt.
exists that lets your phone scan for metal using satellites. Satellites cannot perform localized metal detection through a phone.
Your phone's internal sensor has a very limited range (usually only a few inches to a foot). It cannot "scan" deep underground from a satellite or through thick soil.
Most people would see a virus. Leo saw a legend. Rumor had it this wasn't just a metal detector; it was a leaked interface for a decommissioned orbital surveyor, capable of "seeing" high-density minerals—or buried bunkers—through fifty feet of solid earth.