What's the best Android app for identifying coins and detecting metals with my phone?

Metal Finder is an Android application that specializes in identifying coins and detecting metal objects using a smartphone's built-in sensors. It is particularly useful for coin collectors, hobbyists, or anyone who frequently comes across unknown coins and wants quick identification. The app employs the device's magnetometer to detect metallic objects, and when a coin is found, users can access a detailed database that provides information on coin type, origin, and historical context. A camera-based recognition feature allows for snapping a photo of a coin to cross-reference it with the database, offering instant results. In real-world scenarios, such as exploring a beach or sorting through old collections, this functionality saves time and reduces the need for manual research. Users report that the identification process is straightforward, with clear audio and visual cues during metal detection. However, some reviews indicate that the accuracy can vary with older or heavily worn coins, and an internet connection is necessary for accessing the full database, which might be a limitation in remote areas. Despite minor interface quirks, like occasional lag when switching between modes, Metal Finder remains a reliable tool for its intended purpose. It balances utility with accessibility, though it's best suited for casual use rather than professional numismatics.