Development of Tools Speed of Blow Reaction Android-Based in Pencak Silat

This research uses the Research and Development Method. Research and Development Method is a research method used to produce certain products, and test the effectiveness of these products. Pencak silat's reaction speed training equipment is valid according to experts' assessment and has been reliable for use in the training process as evidenced by the results of the consistency of the results of the test, this tool has the benefit of the user in terms of the application of technology in sports and the development of martial arts sports performance going forward.