Also show speed limit in Google Maps? How to build the function yourself

Of course, to enable the feature, you need Google Maps itself, ideally in the latest version. In principle, the trick also works with other navigation apps. Plus, download and start the free Velociraptor Android app.

Now follow the instructions displayed in the app.

  1. Enable app permission for display overlay. The app will take you to the appropriate settings page.
  2. Grant the app permission to determine the location.
  3. In order for the overlay to open automatically when you start a navigation application, you must finally activate the accessibility service.
If you followed the steps in the app, you will now see your current speed based on GPS data and the maximum allowed speed in Google Maps. You can customize the icons and hide them if you want. The app obtains the data for the maximum allowed speeds via the OpenStreetMap map service. The TomTom Maps and HERE Maps services can also be subscribed for around one euro per month.

However, you should note that navigation apps are power-hungry – an additional app that constantly measures your speed via GPS drains the battery even more. You should therefore always have an external battery for your smartphone or a car adapter with you to charge your mobile phone in the car.

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