Speedometer is a free iPhone app developed by DOUBLE U s.r.o. that allows users to accurately measure their speed in various modes of transportation. Whether you're in a car, train, boat, on a bike, or even on foot, this app utilizes GPS to provide your position and calculate your speed based on changes over time.

With Speedometer, you have the option to choose between a digital or analog gauge to display your speed. The app supports multiple units of measurement, including mph, km/h, and knots, allowing you to select the one that suits your preference. You can also customize the distance measurement to be displayed in miles, kilometers, or nautical miles.

In addition to measuring your speed, Speedometer provides other useful features such as displaying your current course and calculating the distance traveled. The app also includes an odometer to keep track of the total distance covered. Furthermore, you can view your average and maximum speeds, giving you a comprehensive overview of your journey.

Overall, Speedometer is a reliable and user-friendly app for accurately measuring your speed in various modes of transportation. Whether you're a driver, cyclist, or simply curious about your speed, this app provides the necessary tools to satisfy your needs.