This book follows the design and implementation process of the Dynamic Time Warping Algorithm along with tests results described in graphs and statistics. • What is Dynamic Time Warping Algorithm (DTW)? • How Dynamic Time Warping works? • How is Fast Dynamic Time Warping different from DTW? • Open source code. • Fast Dynamic Time Warping pseudo code. • How we Implemented Fast Dynamic Time Warping on Mobiles • Android sensors tested. • Building the classification model. • Results of tests conducted through: • Graphs. • Statistics. • Final results and conclusion.