Found in almost all technological devices ranging from smartphones, planes, boats, satellites to smart homes, the inertial sensor is one of the most used electronic devices in the world. Due to its indispensable nature and to a very high demand on the market, more and more companies are starting to manufacture this important electronic device, creating fierce competition between these giants of technology. In this article, we introduce you to the leader in this field. Would the Bosch group be the best? According to a 2018 study by Yole Development, the German giant is number one in the manufacture of the most sophisticated and innovative inertial sensors of our time. Having created sensors like BMX160, which are the world's smallest absolute orientation sensor or the BMA456, a triaxial intelligent accelerometer sensor capable of detecting the movements and physical conditions of a person, Bosch has known make its mark over the years while continuing to innovate and adapt these sensors to the needs of everyday life. With 10 years of experience, the German juggernaut is one of the very first manufacturers to miniaturize sensors and adapt them to smartphones. Sensors designed for all industries The strength and the particularity of Bosch is that it has been able to develop inertial measurement units - IMU s that are unique, ultra-refined and very sophisticated in all areas. With its micro inertial measurement unit with 9 ultra-powerful, listenable, portable and less energy-consuming sensors used in smartphones, applications, robots and drones, the group stands out in the world of sport and aviation. In this category, we can mention the BMI26, intended for smartphone applications and BMIO90L for robots that can last up to ten years. In addition, Botch has developed various environmental sensors to measure barometric pressure, temperature, humidity and to detect different forms of gas also with lightning accuracy. The BME280 humidity sensor for smart homes has a lifespan of 10 years.