Velociraptor

Not all of the driving apps provide the speed limits for the roads, but this is very relevant information and can be the difference between getting a fine or not. This is why the Velociraptor app aims to offer this in a way that’s not related to the current application you're using for guidance.
It’s possible to use the app in Google Maps, for example. Velociraptor will simply show up on Google Maps, and the data provided comes from OpenStreetMap. A sound alert is triggered when the speed limit is exceeded, it’s possible to change the settings for the speed limit tolerance, and various other visual customizations are available as well.