Score every pitch. Own every game.
DiamondKing is the game-scoring and pitch-tracking app built for the dugout: every pitch, at-bat, pickoff, and base runner logged on your phone in a couple of taps, with the call showing on your wrist.
Coming soon to the App Store · iPhone + Apple Watch
The Toolkit
Built game-first: fast enough to keep up with live play, deep enough to tell you something afterward.
Log pitches, at-bats, substitutions, and base runners in real time. Tap the diamond to move runners and tap the field to chart where every ball in play landed.
Most pitches take two taps: where it missed, then what happened. Your call carries over from pitch to pitch, one tap undoes a slip, and you can flip to full entry any time.
Call the pitch and the spot, then mark where it landed. DiamondKing tells you whether he hit it and, if not, which way he missed. Shake-offs are tracked too.
The pitcher picked on his own and the ball got away? Pickoffs, wild pitches, passed balls, balks, steals, and advances on errors can all be recorded mid-at-bat, called or not.
Balls, strikes, this inning, and this game sit above the zone grid on the full pitch screen. When a reliever comes in, his pitches are credited to him, not the starter.
Before every pitch, see the hitter's line today, how many times through the order, and his swing, chase, and whiff rates. Heat maps show where he does damage and where he whiffs, with a suggested call and tonight's umpire zone.
Per-pitcher report cards, how often each pitcher hit his spot, a shake-off report, the opposing lineup, and pitch counts by inning. Built automatically, saved and reloadable.
Run Varsity, JV, and a travel team from one phone. Each team keeps its own games and roster, and you can copy a roster forward when a new season starts.
The called pitch lights up on an Apple Watch and on dedicated pitcher and catcher signal watches over Bluetooth. Signals without saying a word.
Your whole staff on the same page, with shared game data across coaches.
Games save to your device after every pitch and stay yours. Reload any past game, any time.
What's New
DiamondKing moves fast because real games keep asking for things. Here is what changed in October 2026.
Pitch calls now go to your Apple Watch and to dedicated pitcher and catcher watches at the same time. Pilot units are in testing.
Run Varsity, JV, and travel teams from one phone, with games and rosters kept separate by team. Create a team, copy a roster from another, switch in one tap.
Two-tap pitch entry alongside the full screen. Tap where it missed, tap the result, and the pitch is logged. Undo is one tap away.
Pickoffs can be recorded even when they were not called, with real outcomes such as ball got away, and runners can be moved right away. Stolen bases, wild pitches, passed balls, balks, and advances on errors can all be recorded from the pitch screen.
This-inning and this-game pitch counts sit next to the ball-strike count, and every pitch is credited to the pitcher who actually threw it.
No more scrolling to reach the buttons. The pitch screen fits on an iPhone SE and every larger phone.
See It In Action
Real screens from the app: the pitch call, the two-tap quick mode, pickoffs, runners, scouting, and the post-game report.
Phone to Wrist
Lock in a pitch on the phone and it shows up on the wrists that need it. Apple Watch works today. Dedicated DK signal watches for the pitcher and catcher are in pilot testing.
Apple Watch: the called pitch lights its cell on the grid.
Limited Beta
DiamondKing is in active development with real teams. Join the early-access list and you'll get a TestFlight invite as spots open — and a say in what gets built next.
No spam — just beta invites and launch news.
The Story
DiamondKing wasn't designed in a boardroom. It's built independently, game by game, by a founder who got tired of paper scorebooks, tipped signs, and stat apps that can't keep up with live baseball.
Every feature ships because a real game needed it. Interested in partnering, investing, or piloting DiamondKing with your program? Get in touch.
The name honors the Diamond Kings — the ball club where it all started.
Quick Answers
iPhone today, with a companion app for Apple Watch. Dedicated pitcher and catcher signal watches are in pilot testing. Android is coming soon.
Yes. Varsity, JV, and travel teams each keep their own games and roster on the same phone, and you switch between them in one tap.
No. DiamondKing works on its own. The watch signals are optional, and details on the signal watches will come as the pilot wraps up.
No. Scoring a game and saving it do not need cell service or Wi-Fi, so it works at the field.
Not yet. We're in beta. Join the waitlist above for a TestFlight invite and launch news.
Coaches first (travel ball, high school, and college programs), plus scorekeepers and baseball parents who want real pitch data.
Beta access is free. Pricing will be announced at launch, and early-access members get first crack at founding-member terms.
Customer Service
Support & questions: support@diamondking.app — a real person reads every message, usually same day.
Bug reports: include your device, what you were doing, and a screenshot if you can.
Feature ideas: beta users steer the roadmap. Tell us what the dugout needs.