Mudflap positions itself as a dual-purpose solution for commercial drivers, combining fuel cost reduction with specialized navigation tools. The app partners with major truck stop chains including TA Petro, Speedway, Kwik Trip, and Sapp Bros to provide instant discounts at participating locations without requiring traditional loyalty programs or credit card commitments. The core functionality revolves around two primary features: fuel discount management and truck-optimized navigation. The fuel savings system operates through a digital authorization process that users activate before pumping, with discounts ranging from $0.25 to $0.83 per gallon according to user reports. The navigation component provides route planning that avoids low bridges, weight-restricted roads, and other obstacles problematic for commercial vehicles, with continuous routing to fuel stations and final destinations. User experience demonstrates straightforward implementation with minimal setup requirements. The interface prioritizes essential functions: location-based fuel price comparisons, discount activation, and navigation controls. Real-world usage patterns show drivers typically use the app for pre-trip planning and spontaneous fuel stops, with the navigation system providing ongoing guidance during journeys. The authorization process requires visiting station attendants but eliminates payment processing through the app. User feedback consistently highlights significant cost savings and navigation reliability. Viktork29 (August 9, 2025) noted the app's simplicity and monetary savings, while Las Vegas OB/GYN (July 30, 2025) reported saving $0.83 per gallon at TA Express with streamlined authorization. Rickontheglen (July 14, 2025) documented consecutive savings across multiple states, and Hardheaded $$ (August 10, 2025) specifically praised the truck navigation update. The app demonstrates particular strength in widespread partner coverage and practical navigation features, though limitations include the requirement for in-person authorization at participating stations rather than fully automated transactions. The service appears most valuable for regional and long-haul truck drivers who frequent participating truck stops and require reliable routing assistance. The combination of financial benefits and safety-oriented navigation creates a compelling value proposition for its target market.