In the new Naturalist role for the Red Dead Redemption 2 game, given the wide variety of animals, you can sample, it can often become difficult to keep track of which animals are stamped currently as you have to continuously switch back and forth between the animal guide and the sample selling screen. You can manage your samples manually using this application. Once a sample is sold just mark it as stamped so that you do not sell a duplicate in the future. You can also manage the number of samples you have currently, and then you can track down what samples are missing from the collection using the filtering options.