Velociraptor - Speed Limits & Speedometer APK for Android

Velociraptor - Speed Limits & Speedometer, developed by Daniel Ciao, provides a persistent speedometer and posted-speed display that overlays other apps on Android. The tool presents current speed and legal limits using crowdsourced feeds from OpenStreetMap and HERE Maps, while offering automatic launch when supported navigation apps open. It also exposes customizable sign styles, audio alerts, and recent-route caching, targeting drivers and commuters who want continuous, visible speed feedback while using Google Maps, Waze, or similar apps.

The app runs as a floating overlay that shows both the vehicle's current speed and the local speed limit, so the information remains visible while another mapping app is in use. Data sources are explicit: the service uses OpenStreetMap and HERE Maps to populate speed signs. Visual options follow Material Design, with dark mode, transparency adjustments, and US versus International sign styles.

On-top display keeps speed and posted limits visible above navigation apps

Automatic triggers and granular controls reduce in-drive configuration

Velociraptor uses Accessibility Services to detect when a navigation app is foregrounded and can launch itself automatically, avoiding manual startup while driving. Settings let you pick units (mph or km/h), choose between sign appearances, set speed tolerance as a percentage or integer, and enable audio warnings on exceedance. Typical setup steps are: enable accessibility access, select supported map apps, and adjust tolerance and display size.

Coverage and device limits constrain accuracy in some situations

Accuracy depends on the phone's GPS performance and on regional OpenStreetMap coverage, so limits may be absent or outdated where community data is sparse. The app implements intelligent caching for recently visited routes, but that only helps areas you have already driven. It requires Android 5.0 or higher and Accessibility Services, which may be a configuration hurdle for some users.

Useful for Android drivers who need a persistent speed reference, with platform caveats

Velociraptor fits drivers who use phone-based navigation and want a constantly visible speed reference that appears over other apps. It falls short for anyone who expects visual signs on an Android Auto car screen, because Google restricts third-party overlays there. Drivers who rely on Android Auto's in-dash display or who operate in regions with thin OpenStreetMap coverage should consider alternatives tied directly to their vehicle or to nav systems with built-in limit data.