Did you know that you can zoom one-handed in Organic Maps?

(I assume they meant one-fingered?) No, I did not, good to know. It works in Comaps too.

If curious:

  • Tap quickly twice anywhere on the map, but don’t lift up a finger after the 2nd tap.

  • Move your finger up or down to zoom out or zoom in.

That gesture works on pretty much all native Android apps.
Same on iOS… so it is a pretty universal gesture.