Speedometer Simple by WATT APPS represents a focused approach to mobile speed measurement, leveraging iOS device GPS capabilities to deliver real-time velocity data without additional hardware requirements. The application positions itself in the utilitarian segment of navigation tools, distinguishing itself through simplicity and reliability rather than feature overload. The core functionality centers around precise speed calculation using the device's built-in GPS receiver, supporting three measurement units (mph, km/h, and knots) with automatic conversion. Additional features include trip distance tracking, average and maximum speed calculations accessible through a secondary screen, and optional display elements including current city name and compass orientation. The interface offers customization through multiple pre-selected color schemes, addressing both visibility preferences and aesthetic considerations. Trip recording functionality allows users to maintain historical data of their journeys, providing valuable metrics for performance analysis. User experience demonstrates thoughtful design decisions, particularly regarding readability—large font sizes ensure quick glances provide necessary information during movement. The interface maintains minimalism while offering depth through optional elements, preventing clutter during primary speed monitoring tasks. Real-world usage patterns observed across reviews indicate effectiveness across various scenarios: cycling (as noted by Prapez Nairo on 2025-07-19), running (Pacman20222222, 2025-07-20), and vehicle speed verification (Mattyd2076, 2025-08-04). The application's design accommodates both handheld use and mounted configurations, particularly when paired with bicycle handlebar mounts. User feedback consistently highlights accuracy as the primary strength, with multiple reviews specifically comparing favorably against other speed measurement applications. Benji DiLucia's July 2025 review emphasizes the application's responsiveness and customization options, while Mattyd2076's August 2024 assessment provides specific numerical validation against known speeds. The mini-bike testing scenario described by ,,??.!6;' if so on 2025-07-28 further demonstrates the application's versatility across unconventional use cases. All cited reviews reflect the 4.73/5 rating through unanimous 5-star evaluations, though the sample size remains relatively small. The application's strengths lie in its focused functionality and reliability, though limitations include dependence on GPS signal quality and the absence of advanced features like route mapping or social sharing capabilities. While sufficiently accurate for most recreational and verification purposes, professional applications requiring certified calibration would require dedicated hardware. The application excels as a supplementary tool for athletes, hobbyists, and anyone requiring quick speed verification without investing in specialized equipment.