Pitch Speed Tracker is a free iPhone app developed by Blake Williams. This app is designed for those who want to measure the speed of their pitches accurately.

With Pitch Speed Tracker, you can record a video of a pitch, capturing both the pitcher and catcher in action. The app allows you to select the video frame when the pitcher releases the ball and another frame when the ball crosses the back of the plate. By adjusting the distance settings for different levels of play, such as pro/college, high school, youth baseball, or softball, you can easily calculate the speed of your pitches.

It's worth noting that Pitch Speed Tracker does not automatically measure the speed for you. Instead, it provides you with the tools to accurately calculate the speed based on the video frames you select. This app is a great tool for pitchers who want to track their progress and improve their pitching skills.