Decider is an interesting app because you can evaluate decisions very precisely and generate the most optimal ones. You can navigate from top to bottom, i.e. from general to individual, like the decision list to its decision objects and from there to the categories and back. Categories are very important such as design, ecology and performance in a car. You can rate which criteria mean more with a rating from 1 to 4, e.g. design before performance. Then you can set a grade from 1 to 8 for a certain object (car). This then determines the order of the objects, i.e. the best decision at the top.