The Google (news?) app on Android used to have a nice continuous scrolling behavior where you could start scrolling with two thumbs then keep one thumb on the s

The Google (news?) app on Android used to have a nice continuous scrolling behavior where you could start scrolling with two thumbs then keep one thumb on the screen and rock it back and forth on just the thumb pad. Any displacement of the "held" touch caused the screen to smooth scroll in the direction of the initial scroll in an amount proportional to the speed of the initial scroll. Found it quite pleasant, but was never able to locate documentation of it. Would have enjoyed it as a generic behavior for all apps, particularly the browser.