Speedometer - Odometer App by GeniusTools Labs transforms Android smartphones into functional GPS-based speed tracking devices, positioning itself as an accessible alternative to built-in vehicle instrumentation. The application leverages satellite positioning to deliver real-time velocity data, distance traveled, and additional metrics relevant to various modes of transportation including automobiles, motorcycles, and trains. The core functionality centers on precise GPS speed calculation with continuous updates, odometer functionality for journey distance tracking, and customizable display units (km/h or mph). The interface features multiple visual themes including a night mode with high-contrast illumination, addressing visibility concerns during low-light conditions. Additional practical features include trip history logging, maximum speed recording, and an overspeed alert system that notifies users when exceeding preset velocity thresholds. User experience demonstrates thoughtful design with large, legible digits and intuitive menu navigation. The application maintains functionality during background operation, allowing simultaneous use with navigation apps. Real-world testing confirms reliable performance in urban and highway environments, though accuracy naturally depends on GPS signal strength. The night mode particularly enhances usability for evening driving, providing clearer visibility than many analog dashboards without causing significant screen glare or battery drain. User feedback consistently highlights the application's reliability as a backup speed measurement tool. Multiple reviews from Victoria Hill on April 25, 2025, note the application serves as 'definitely a bonus if your speedometer is not working or if you just want to see it lit up a little bit better at night time then on your dash.' This sentiment reflects broader appreciation for the visual clarity and functional redundancy the application provides. The application's primary strength lies in its straightforward execution of core speed tracking functionality with enhanced visibility options. Limitations include inherent GPS latency affecting real-time accuracy during rapid acceleration and dependence on smartphone hardware capabilities. Battery consumption remains moderate during extended use. Ideal use cases involve secondary speed verification, vintage vehicle instrumentation replacement, and situations requiring improved night visibility beyond standard dashboard lighting.