Speedometer: GPS Speedometer by Simple Design Ltd. represents a specialized mobile tool that leverages satellite positioning to deliver precise velocity measurements for various transportation modes. The application positions itself in the competitive navigation utilities market by focusing specifically on speed tracking accuracy rather than comprehensive navigation features, targeting users who require reliable speed data independent of their vehicle's built-in instrumentation. The application's core functionality centers around real-time GPS speed tracking with dual display modes—digital and analog—accompanied by an odometer for distance measurement. The speed limit alert system provides auditory and visual notifications when exceeding preset thresholds, while the head-up display (HUD) mode projects speed information in a windshield-friendly format for nighttime driving. Premium features unlocked through subscription include live mapping with route tracing capabilities, though the free version remains functional with minimal advertising according to user reports. User experience demonstrates thoughtful design considerations for practical implementation. The interface maintains large, legible numerals suitable for mounting scenarios on bicycles, motorcycles, or dashboards. Real-world usage patterns indicate primary application for vehicle maintenance tracking (noting riding hours and mileage), speed verification against faulty vehicle speedometers, and recreational use during cycling or motorcycling activities. The HUD mode's effectiveness particularly stands out for nighttime driving scenarios where reduced dashboard illumination is desirable. User feedback trends consistently highlight accuracy and utility across diverse transportation contexts. Brandi Bishop (August 23, 2025) noted effectiveness for tracking maintenance intervals across multiple mini-bikes and dirt bikes, praising display visibility when mounted. John Cornett (August 22, 2025) reported verification from law enforcement regarding the app's accuracy when their vehicle speedometer displayed incorrect readings. Rub Ima (July 28, 2025) clarified misconceptions about mandatory payments, noting manageable advertising in the free version despite initial subscription prompt ambiguity. The application demonstrates notable strengths in measurement accuracy and multi-modal vehicle support, though limitations include potential subscription model confusion and reliance on GPS signal quality. Ideal use cases encompass vehicle maintenance tracking, speedometer verification, and scenarios requiring large-format speed displays. The application serves particularly well for users operating older vehicles with unreliable speedometers or those requiring detailed activity metrics for maintenance scheduling across multiple vehicles.