ВУ-45 is a train brake calculation app developed by paradox77. This app allows you to calculate the braking force of a train and its manual brakes. All you need to do is enter the number of wagons, and the app will do the rest for you. The app calculates the braking force of an empty train (by default), rounds the result up, and calculates the braking force of a long train. It also indicates the number of wagons that are turned off in long trains.

Moreover, the app calculates the insufficient braking force in heavy trains up to 30t, highlights the insufficient braking force, and shows the TM density depending on the locomotive type and the number of axles. It provides a hint of the train's charging pressure, depending on whether the wagons are loaded or not. There is also a reminder for the inspector to check the wagons and a stopwatch to measure the TM density with highlighted results. The app also vibrates when there is insufficient braking force.

Overall, ВУ-45 is an excellent app for those who want to calculate the braking force of a train and its manual brakes accurately.