If the player rolls a 1, he scores zero and the turn goes to the next player.
If the player rolls any other number, he scores the total and he continues its turn.
If a player choose to "hold", he scores the total and the turn goes to the next player.
The first player to score 100 or more points wins.
This is a version with two players: you and your device which follows an special strategy.
The app can be used as a personal trainer to play after with your friends on a table with actual dices.