HeyBLU: Baseball Strike Zone

Every bullpen deserves BLU — Big League Umpire.

HeyBLU turns the iPhone you already carry into an 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.

No radar gun. No smart baseball. No cell service or Wi‑Fi required. Built for real dirt fields.

AFFORDABLE PRECISION TECH Umpire your bullpens all year long for about what it costs to hire a single ump for one game. Bucket Dads, Diamond Moms, Pitching Coaches and teams can get a consistent, objective zone for practices, bullpens, and scrimmages all season.

ESTABLISH COMMAND Live Audio Calls: Instant ball or strike through your iPhone, Bluetooth speaker, or earbuds.

Train to Your Zone: Adjust zone height and width for your league or age group.

Every Pitch Tells a Story: Heatmaps and pitch logs show plate-crossing location, pitch count, and estimated velocity when the trajectory is strong enough to trust.

NEW IN THIS VERSION 3D Replay Review just like the Bigs. Watch any single pitch, or see the entire bullpen from any angle.

Baseball & Fastpitch: HeyBLU tracks 11-inch / 12-inch softballs as well as baseball.

Follow Live: Share a live, read-only feed to a second device so coaches or parents can follow from the dugout or stands. Connect via WiFi and see pitch location from the stands.

BUILD BETTER BALLPLAYERS Own the Zone (Command Center): On a second device, pick the intended location before the pitch. HeyBLU compares result to target and builds a command rating.

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 Try HeyBLU free for 14 days. Then subscribe for $12.99/month or $79.99/year (U.S.) to unlock unlimited pitcher profiles, command heatmaps, saved reports, and data exports.

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.

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