HeyBLU: Baseball Strike Zone

HeyBLU is a live, objective strike zone for youth baseball and fastpitch softball. Mount your phone, set the zone, and hear live “BALL” or “STRIKE” the moment the pitch crosses the plate. Make your next bullpen count with BLU/Big League Umpire.

No radar gun. No sensors in balls. No cell service or Wi‑Fi required. Built for any outdoor field including your backyard.

AFFORDABLE PRECISION TECH
Train command with your bullpen umpire what it costs to hire one umpire, or one pitching lesson.
Bucket Dads, Diamond Moms, Pitching Coaches and teams, track your progress with heatmap reports after every bullpen.

ESTABLISH COMMAND
Size the strike zone, hit your target, hear instant BALL or STRIKE through your iPhone, or connect a Bluetooth speaker, or earbuds.

Train to Your Zone: HeyBLU's zone is adjustable to make it more or less challenging to get strikes, or to match the zone you expect on game day.

Every Pitch Tells a Story: Heatmaps in both 2D and 3D Replays, just like the Pors. Every pitch logs plate-crossing location, pitch count, and estimated velocity.

NEW IN THIS VERSION
• Share reports straight to Instagram.
• Sharper fastpitch softball calls.
• Spreadsheet data now in feet and inches. Keep the suggestions coming — HeyBLU gets better with every bullpen

SELECT YOUR SPORT:
Baseball & plus 11-inch or 12-inch softball tracking.

Follow Live: With a 2nd iPhone or iPad fans can follow along.

COMMAND TRAINING TOOL
With a 2nd iPhone or iPad coaches or player can pick the intended location before the pitch. HeyBLU compares result to target and builds a sharable command rating report.

Earn Your Innings: Save and compare pitcher performance over time to see who hits their spots.

Solo Bullpens: Get instant audio feedback while throwing alone.

Batter’s Eye: Give hitters a consistent zone so plate discipline isn’t “close enough.”

Umpire Training: An objective reference for aspiring umpires — we empower umpires; we don’t replace them.

START YOUR 14-DAY FREE TRIAL. Not at the field yet? Download, select a reminder, and your trial doesn't begin until you're ready.

Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel in Account Settings. Any unused portion of a free trial is forfeited when you purchase a subscription.

Privacy Policy: https://www.heyblu.ai/privacy
Terms of Use: https://www.heyblu.ai/terms