Velociraptor is a free Android app that acts as a floating speed limit monitor and speedometer. It can be used as a companion for any map or navigation app. The app uses speed limit data from OpenStreetMap and offers polished Material Design.

The app has several features that make it stand out, including automatic display in any app of your choice, intelligent caching and fast refresh of speed limits, and a sound alert when the speed limit is exceeded. Additionally, the app allows users to customize the style of the speed limit display, including the option to choose between US and International styles. Users can also set speed limit tolerance levels in percentage or integer amounts.

Velociraptor offers transparency, size, and tap to hide settings, making it a highly customizable app. However, it is important to note that Android Auto support is not included due to Google's restrictions. The app uses Accessibility services to detect foreground map apps and launch automatically.

Overall, Velociraptor - Speed Limits Speedometer is a useful and practical app for drivers who want to keep an eye on their speed while using other navigation apps.