(magnetic sensor). This sensor measures electromagnetic fields and can only detect ferrous metals like steel or iron; it detect non-ferrous metals like gold, silver, or copper. Satellite Limitations:
Marketed for finding buried graves, treasures, and artifacts in various climates and depths. Critical Technical Realities (magnetic sensor)
from unofficial sources (outside Google Play Store) is a common vector for malware, spyware, or adware. it detect non-ferrous metals like gold