This book gathers the proceedings of the 7th IFToMM International Conference on Mechanisms, Transmissions, and Applications (MeTrApp), held in Taoyuan City, Taiwan, on September 1-3, 2025; this book covers topics such as mechanism and machinery design, parallel manipulators, robotics and mechatronics, control applications, mechanical transmissions, cam and gear mechanisms, and dynamics of machinery. MeTrApp provided researchers, scientists, industry experts, and graduate students from around the globe with a platform to share their cutting-edge work on mechanisms, transmissions, and their applications. The proceedings extend this platform to all researchers, scientists, industry experts, and students interested in these fields.