bookmark piRNApredictor Predicts piRNA by integrating twenty-three discriminative features. piRNApredictor is constructing on a genetic algorithm-based weighted ensemble method (GA-WE). It is able to produce good performances in the cross-species prediction. This tool determines the weights for each base learner in a self-tune manner. It shows good robustness comparing with other state-of-the-art methods and can be very useful for transposon-derived piRNA prediction.