WiFiAnalyzer is a production-grade Android application for analyzing Wi-Fi networks. It scans nearby access points, displays signal strength in real-time, and provides channel and time-series graphs to help optimize network performance. The architecture is a standard Android app with a single Activity (MainActivity) hosting multiple Fragments via Navigation Component. Core modules include a scanner service (Scanner + PeriodicScan), a data transformer that converts raw ScanResults into domain models (WiFiDetail, WiFiSignal), and a graph abstraction layer (GraphWrapper) built on the Vico charting library. The app features robust filtering (SSID, band, strength, security), rating of channels by congestion, vendor/OUI lookup, and configurable settings persisted via a Repository pattern. It demonstrates high craftsmanship through its test coverage (98% instruction, 95% branch), consistent use of Kotlin coroutines, and well-separated concerns. The codebase is actively maintained, with moderate coupling to Android SDK versions but clean internal APIs.