In the Windows Mobile version of the game you would win nudges and then nudge the reels manually using the buttons beneath each reel. There was no facility to nudge upwards and visibility is limited to only the fruit directly above the winline. That meant that it was very difficult to get a decent win with nudges.
In Cherry Chaser for Android I've just implemented an auto-nudge feature that will entirely replace manual nudges. Once the amount of nudges awarded has been established the machine looks for the best possible win attainable with those nudges and then performs the nudges automatically.