HeyBLU
The Automated Strike Zone in Your Pocket.
Turn a single iPhone and a tripod into a pro-grade pitch tracker. Real-time ball/strike calls, Command Training, and session analytics for bullpens, practice mounds, and the local fields where coaches and families develop pitchers every week.
One phone, one tripod—that’s the setup.
See it in action
Live tracking and instant calls. Click to play
Command Center, heatmaps, and session data.
Meet HeyBLU
Your smartphone becomes a precision strike zone tracker with real-time AI assistance.
Real-Time Audio Calls
HeyBLU delivers instant strike/ball calls via Bluetooth, boosting umpire confidence and precision.
Live Strike Zone Tracking
Advanced monocular depth technology maps every pitch's exact location in and around the zone.
Pro-Level Analytics
Coaches unlock premium pitch data, heatmaps, and player analytics previously only available to pros.
Player development & league operations
Built for the people who develop players and run the games.
For Player Development
Make every bullpen session count. Intent-based target accuracy, heatmaps, and pro-grade tracking during practice so your pitchers show up ready on game day.
For League Operations
Bring automated balls and strikes to your league or tournament. HeyBLU is strongest at the bullpen and in practice—and we work with organizations on game-day ABS. Talk to us about ABS for your organization →
Purpose-Built for the Youth Game
HeyBLU is built for the youth diamond—chain-link backstops, foul-line tripod angles, and the pace of local baseball:
- Offset camera angles:Mounts safely in foul territory beside the plate—the same sightline coaches use every bullpen.
- Real-time zone feedback:Track every pitch in and around the zone and hear the call over Bluetooth while you coach.
- Zero infrastructure:One iPhone, one tripod, and optional Wi‑Fi for a second screen—ready in minutes at the field.
How It Works
Straightforward steps from mount to review. Setup tips and best results: Field Guide and FAQ.
Mount the iPhone
Place a tripod beside home plate with a clear view of the plate and pitching lane (foul-line / on-deck alignment).
Lock the plate
Tap the screen to anchor the 3D strike zone to the physical plate, then fine-tune on Mount & Verify.
Throw
Get real-time audio calls and track hit/miss accuracy via Command Training and the Command Center remote.
Review
Open heatmaps and pitch data as soon as the session ends—on your phone, ready to share.
The Challenge Facing Youth Baseball
80% of umpires quit within 2 years. Too little training, too much abuse.
Higher levels of baseball rely on data generated by massive, expensive camera arrays. HeyBLU puts that same power in your pocket.
Umpire Shortage
Youth umpires face constant pressure with minimal support, leading to massive turnover rates.
Limited Access to Data
Coaches and players lack the analytics tools available to pros, limiting development opportunities.
Inconsistent Zones
Objective strike zone feedback helps coaches and players build consistency pitch after pitch.
The New Standard is Here
MLB has officially adopted the ABS Challenge System. Players and parents now expect objective strike zones at every level.
You don't need a $50,000 stadium radar array to give it to them.
You just need an iPhone and a tripod or fence mount.
Field Notes
Founder writing on the youth baseball economy, shipping computer vision in the wild, and why a resizable zone matters—on HeyBLU on Substack.
Strategy
The Biggest Opportunity in Youth Baseball Isn’t the Game
Why the real entry point is everything around the game—and what that means for operators and investors.
Read on Substack →
Engineering
Out of the Lab, Into the Messy Real World
Mapping dirt, chainlink, and bad angles—why shipping on local fields is the hard part of “accurate enough.”
Read on Substack →
Product
Letting Coaches Cheat the Rulebook
A tunable strike zone for development: when the human zone doesn’t match what you’re training for.
Read on Substack →Apply for Beta / Request TestFlight Access
HeyBLU is in active beta on iPhone (iOS). Submit this form with a valid email—we’ll send your TestFlight invitation to that address when you’re approved.
Apple TestFlight uses the same email you enter below.