What's the best iOS app for commercial truck drivers to navigate safely and avoid road hazards?

TruckMap is a specialized navigation app designed specifically for commercial motor vehicle operators, focusing on safety and compliance. Its core strength lies in providing accurate, truck-optimized routes that account for vehicle dimensions, weight, and hazardous material restrictions. For instance, when planning a trip, drivers receive multiple route options, which is crucial for adapting to sudden road closures or construction—a common scenario mentioned in reviews, such as navigating mountainous areas in Virginia. The app integrates data on low bridges, tunnel prohibitions (e.g., for propane tanks), and other obstacles, helping avoid costly fines and detours. Reviews indicate that users often rely on TruckMap as a primary or backup tool, with some noting it outperforms dedicated GPS devices like Garmin in accuracy. Real-world use cases include trip planning for new trucking companies with budget constraints, where the app's free or affordable model provides essential routing without upfront hardware costs. However, a minor drawback noted in feedback is that voice prompt volume can sometimes be too low over Bluetooth connections, potentially requiring adjustments during drives. Despite this, the app's reliability in hazard avoidance and route flexibility makes it a solid choice for professional drivers seeking a digital copilot.