Is there a possibility, that the zoom buttons on the screen stay and don´t disappear after some seconds without touching the screen?

Why do you need this function? Zoom buttons seem to be the least used buttons in mobile map apps, as there are 6+1 gestures available to zoom the map.

Because i have to tap several times on the screen while driving… that takes time and creates unwanted movement on the screen.

Fast zwei Jahre später antwortest du und dann noch auf eine Version die es nicht mehr gibt?