Stolen signs
The opposing dugout has a phone, a coach, and time. Hand signals are leakier than they've ever been.
Eliminated · BLE pair
Beta on TestFlight · Free
Pitch calls
Pitch calls
from the dugout to the wrist in 90 ms.
Tap a pitch on your iPhone. The catcher feels a buzz on the Apple Watch they already own. No wires, no delays, no stolen signs.
Caller · iPhone
LIVE
#3 Austin
Count 1-2
Receiver · Apple Watch
PAIRED
9:14
FB
1
The dugout problem
Hand signs got slow. Wired comms got expensive. Coaches deserve better.
Old-school flashes get stolen. PitchCom-style hardware costs four figures a season. Yelling pitch numbers from the bench gets old by April.
Hardware sticker shock
Dedicated comms systems are $700–$1,400 a year for a single team. Most travel programs can't justify that.
Replaced · Free on iOSGame-day chaos
Forgotten wristbands, dead AAA batteries, reverse-coding mid-inning. One more thing to manage on a bus day.
Solved · Pair once, ready
How it works
Three steps. No wires. Less than a tenth of a second.
The whole call-to-display loop runs over Bluetooth Low Energy, directly between the iPhone in your hand and the Apple Watch on the catcher.
Tap a pitch
Pick pitch type and zone on your iPhone — five-tap path from idle to sent.
Signal sent
Bluetooth Low Energy delivers the call directly to the watch — offline, no cellular, no router.
Catcher sees it
Pitch, zone, and sign number on the wrist with a haptic buzz. Glance, set, deliver.
Receivers
Start on the watch you already own. Add hardware when you're ready.
Two paths, one app. Most programs start with the catcher's own Apple Watch and never need anything else.
Start here
Free · No setup
Apple Watch
The watch your catcher already owns. Nothing to ship, nothing to charge separately.
- CostFree with the iOS app
- CatchersOne catcher at a time
- SetupOpen app, wear watch — done
- DisplayFull color, haptic buzz
Upgrade path
Sold separately
Dedicated Receiver
Purpose-built hardware for programs that want multi-catcher support and a no-distraction display.
- CatchersMultiple at once
- Battery5 days · IP67 · 38 g
- Display1.3" color · no lockscreen
- RadioBluetooth 5.0
Pricing
No subscription to get started. Ever.
Pitch calling is free. Forever. The optional Pro subscription unlocks advanced analytics, pattern tracking, and AI pitch suggestions for coaches who want the deeper toolkit.
Signal Call
Freeforever
Everything you need to call a game wirelessly. No card, no trial, no expiry.
- Pitch calling to Apple Watch
- 9-zone targeting + sign numbers
- Live pitch counts & at-bat history
- Custom defensive plays & signals
- Offline over Bluetooth — pair once
Signal Call Pro
IAPmonthly · annual
For coaches who want the deeper toolkit — advanced analytics, patterns, and AI assistance.
- Advanced analytics — strike trends, zone heatmaps, workload
- Pattern tracking — batter tendencies, count-by-count metrics
- AI Pitch Suggestions · coming soon
- Multi-device support — multiple receivers
- Pitcher roster & CSV export
Analytics
Every pitch becomes data — without exporting a thing.
Strike trends, zone tendencies, and pitch counts are tracked the moment you tap. Review the whole game from the dugout, not from a spreadsheet.
#27 Randy · Live
INN 5 · 2 OUT
Pitches
42 +3
Strike %
64% +2
Top pitch
FB
Top zone
Z5
Strike %
Ball %
Pitch mix
Zone heat
Pitch-by-pitch logs. Inning trends. Workload at a glance.
The whole game becomes reviewable, not just the box score. Coaches who track count, mix, and zone heat make better decisions in the late innings.
- Live pitch counts per pitcher
- At-bat history — every pitch, every batter
- Strike/ball trends across innings
- Zone-by-zone tendency heatmaps
- Export to CSV (Pro)
Rules at a glance
Where electronic pitch calling is allowed.
The short version. Always check your league's most current rulebook before opening day.
League
Allowed
Notes
NCAA Baseball & Softball
Yes
Electronic devices permitted for relaying signals from the dugout, all positions.
NFHS (High School)
Yes
Coach-to-catcher signaling generally permitted; expanded use varies by state.
USSSA · Perfect Game · Triple Crown
Yes
Allowed across most travel-ball organizations.
Game Day USA · NCS
Yes
Permitted under standard tournament rules.
Little League · Babe Ruth
Restricted
On-field player receivers are restricted. Bench-only use may be permitted — check current local rules.
Last verified for the 2026 season.
Full league-by-league breakdown →
Built by coaches
Made on the way home from a Saturday doubleheader.
Signal Call started as a side project for a 14U travel program that couldn't justify a four-figure comms system. The first version ran on a coach's iPhone and a catcher's hand-me-down Apple Watch. It worked the first inning. We never went back.
Today it's the same idea, polished — but it's still made for the people who run practice on Tuesday and call a game on Friday.
FAQ
Common questions.
Rules, requirements, and how Signal Call compares.
Is electronic pitch calling legal?
Rules vary by league. NCAA baseball and softball permit electronic devices for relaying signals from the dugout at all positions. NFHS (high school) generally permits coach-to-catcher signaling, with expanded use decided by each state association. Most travel organizations (USSSA, Perfect Game, Triple Crown, Game Day USA, NCS) allow it. Little League and Babe Ruth restrict on-field player receivers. Always check your specific league's most current rulebook. Full league-by-league breakdown →
Does the catcher need an iPhone?
No. The coach uses an iPhone in the dugout to call pitches. The catcher just needs an Apple Watch — the signal goes directly from iPhone to Apple Watch over Bluetooth. No phone is required on the field.
How does Signal Call compare to PitchCom?
PitchCom uses dedicated audio receivers and a wristband transmitter, with annual hardware costs typically running several hundred dollars per team. Signal Call is free on iOS and runs on the Apple Watch your catcher likely already owns, with optional dedicated receiver hardware available for programs that want multi-catcher support or a purpose-built device.
Does it work without cellular service?
Yes. Signal Call uses Bluetooth Low Energy directly between the iPhone and the receiver. No cellular signal, Wi-Fi, or internet connection is required. It works in any dugout, indoor facility, or remote field.
How fast is the signal delivered?
The full call-to-display loop completes in under a tenth of a second. The catcher feels a haptic buzz on their wrist and sees the pitch type and zone instantly.
How much does it cost?
The Signal Call iOS app is free, including pitch calling to an Apple Watch receiver. Signal Call Pro is available as an in-app purchase and adds advanced analytics, pattern tracking, AI pitch suggestions, multi-device support, and CSV export. Dedicated receiver hardware is sold separately.
Coaching a team? Want early access?
We're onboarding teams for the beta program. Discounted hardware, free year of Pro, and a direct line to the people building it.