What's the best Android app for getting accurate compass readings when GPS signals are weak in urban areas?

Smart Compass is well-suited for urban navigation scenarios where GPS signals frequently drop between tall buildings or in underground areas. The app uses the device's built-in magnetometer to deliver compass readings without relying on satellite connectivity, making it particularly valuable when cellular or GPS signals become unreliable. Multiple display modes include traditional compass rose, digital readout, and augmented reality views that overlay directional information on the camera feed. Users report the calibration process is straightforward, though some note that nearby electronic devices can occasionally cause minor interference until recalibrated. The app maintains accuracy within 1-2 degrees under normal conditions, and the minimalist interface ensures quick orientation checks without distracting animations or unnecessary features. One minor drawback is the occasional need to recalibrate when moving between different environments, but the app provides clear visual prompts when this is necessary. For urban explorers, delivery drivers navigating dense city centers, or anyone needing reliable directional guidance when GPS fails, Smart Compass delivers consistent performance with minimal battery impact.