Measure pitch speed using your iPhone's slow-motion camera. Simply record your throw, and the app provides the speed, ball path, and confidence level. Track player performance, save personal bests, and share slow-motion videos.
1.2
October 30, 2026
Small improvements and fixes.
Unlimited pitch-speed readings, yearly
Heater Meter uses your iPhone's slow-motion camera to analyze the ball's flight path. By tracking the ball's movement frame by frame, it calculates the speed without needing any external sensors or radar equipment.
Yes, Heater Meter is designed to work from behind the backstop. It can measure a pitch coming towards you by analyzing how the ball drops under gravity.
Bullpen Mode allows you to continuously record pitches. The app calls out each pitch speed, records it, and then prepares for the next throw, providing a summary of all pitches at the end of the session.
Heater Meter provides honest numbers by showing the ± margin for every reading. If the video quality doesn't support a precise measurement, the app will indicate this instead of guessing.
Heater Meter offers a Pro subscription for unlimited readings. You can choose between a monthly plan for $4.99 or a yearly plan for $29.99. Your first 10 readings are free with all features.
You can manage or cancel your subscription at any time through your iPhone's Settings. Navigate to Settings > your name > Subscriptions to find the cancellation options. Ensure cancellation occurs at least 24 hours before the current period ends.
Heater Meter is designed for privacy. All video analysis is performed directly on your iPhone, and no data is uploaded. You do not need to create an account to use the app.
Heater Meter was last updated on October 30, 2026, with version 1.2. The app is available for iPhone and iPad and is rated for ages 4 and up.
