A percentage value can be setup for a buffer value in addition to an absolute value in mph or km/h. Tap on a blue mph or km/h button in the window above to switch to %.
Want to do more with speed limits?
Speed limits memory
Allow speedometer to remember speed limits as you apply them and re-apply them automatically for you the next time!
Complete showcase video and text manual.
This feature is available only in a full version. You can upgrade by tapping here.