HeyBLU
The Automated Strike Zone in Your Pocket.
Turn a single iPhone and a tripod into a pro-grade pitch tracker. Built for the bullpens, practice mounds, and local rec fields that expensive multi-camera systems ignore.
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
Don't waste your bullpen sessions. Get intent-based target accuracy, heatmaps, and pro-grade tracking during a Tuesday practice so your pitchers can execute on Saturday.
For League Operations
Deploy ABS to any field in 60 seconds. Hand an iPhone to an operator behind the backstop to create an objective, resizable strike zone that eliminates parent-umpire screaming matches.
Purpose-Built for the Youth Game
Stadium systems are built for 100 MPH fastballs and 400-foot center fields. HeyBLU is built for the messy reality of local baseball:
- Offset Camera Angles:Mounts safely to the chainlink fence, not directly behind the catcher.
- Realistic Accuracy:Consistent tracking to the width of a baseball—more reliable than most human umpires at this level.
- Zero Infrastructure:No wiring, no tech crews, and no permanent installations.
How It Works
Straightforward steps—and the operating envelope we’ve proven on real fields. When you set it up like this, you get the best results.
Mount the iPhone
Place a tripod 10 to 25 feet behind and to the side of home plate (foul-line / on-deck style alignment), with a clear view of the plate and pitching lane.
Lock the plate
Tap the screen to anchor the 3D strike zone to the physical plate.
Throw
Get real-time audio calls and track hit/miss accuracy via the Command Center remote.
Review
Open heatmaps and pitch data as soon as the session ends—no waiting on uploads or a control room.
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
Without objective feedback, improving strike zone consistency and player development is nearly impossible.
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.