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In development · Launching for spring 2026

Walkup songs & player announcements. Just better.

Walkup songs, AI announcer intros, personalized playlists, and a soundboard built for the dugout. This is what game day audio looks like when it's done right.

Demo accessRequest early access
5min
From download to game time
20sec
Team builder from lineup screenshots
iOSfirst
Android in development
The Dugout

Tap a player. Play their song.

There's a special kind of energy when a player's song hits right as they step in. Diamond DJ makes that happen reliably every time — so easy to use you'll never look back.

Now batting Highlighted card with live waveform.
On deck Outlined row, queued and ready to play.
Lineup Drag to reorder. Long-press to bench.
Now playing Persistent bar across every screen.
What's in the app

The walkup-song app we couldn't find. So we built it.

Easy to set up. Easier to use. None of the headaches that made you put down the other ones.

Walk-up songs

Every kid gets their moment.

The full Apple Music catalog at your fingertips. A clip editor that hits to the half-second. Album artwork everywhere it ought to be — and silence, never, when it shouldn't.

Game-day dugout

One screen.
One tap.
Every batter.

"Now batting" highlights, progress fill on the active row, auto-stop at the configured clip end.

New Roster import
20sec

From screenshot to roster.

Drop a lineup screenshot. The app reads names and jersey numbers. Done.

Coming soon AI announcer

"Now batting,
number seven…"

Lifelike voice intros for every player. Generated once, cached forever. No per-player fees.

Now playing

Always one tap from the music.

Persistent bar across every screen. Album art, scrubbable progress, skip controls.

Background audio

Bluetooth, done right.

No volume jumps. No dropouts. Plays through phone lock. The speaker just works.

Warmup playlists

Your team's favorite playlist, without leaving the app.

Build different warmup sets for home games, away games, or pre-game stretches. Auto-advance, drag to reorder, swipe to delete. The pre-game runs itself.

Team management

More than one team. No drama.

Custom colors and logos per team. Share codes for assistant coaches.

Team Colors

Make it yours.

Pick your team's accent from a color wheel or twelve presets. Light theme, dark theme, or auto. The app adapts to your colors — not the other way around.

Haptics + motion

Spring physics throughout. Because the small things matter.

Tactile feedback on every interaction. Smooth spring animation on every sheet, every modal, every drag.

Roadmap

What's shipped, what's next.

Built in public. Releases ship over the air, so the gap between "added it" and "you have it" is hours, not weeks.

Live now
Apple Music
Full catalog, full-length playback for subscribers
Up next
Spotify
Remote control of Spotify playback, coming soon
Shipped
32 features
Music catalog & playback 8
  • Apple Music catalog search + full-length playback
  • iTunes preview fallback for non-subscribers
  • Apple Music + iTunes song search
  • Popular songs with pre-loaded artwork
  • Real album artwork throughout
  • Explicit content badge and filter
  • In-sheet song preview playback
  • Background audio playback
Game-day dugout 8
  • Tap-to-play game-day dugout
  • Now batting / on deck states
  • Playback progress fill on active row
  • Auto-stop at configured clip end
  • Glass play button with waveform animation
  • Drag-to-reorder lineup, swipe-to-delete
  • Bench / unbench player management
  • Persistent now-playing bar across screens
Clip editor 4
  • Dual-handle range bar for clip selection
  • Editable timestamps to the half-second
  • Live clip preview with playhead
  • Scrubbable progress bar with timestamps
Warmup & playlists 3
  • Multiple warmup playlists
  • Auto-advance playlist playback
  • Skip previous / next for playlists
Team management 5
  • Multiple teams with branding and logos
  • Drag-to-reorder teams
  • Roster CRUD with player profiles
  • Share codes for joining teams
  • Bulk roster import from screenshot
App polish & infrastructure 4
  • Light / dark / auto theme
  • Custom accent color picker
  • Haptic feedback throughout the UI
  • Over-the-air updates via EAS
Coming soon
11 features
Music sources 3
  • Spotify integration (remote playback control)
  • Local file import from device music library
  • Apple Music full-song warmup playlist queues
Audio tools 4
  • AI voice announcer for player intros
  • Custom soundboard with user-uploaded sounds
  • Real waveform visualization in clip editor
  • Fade in / fade out volume controls
Team & player 3
  • Player photos from camera or gallery
  • Team-specific warmup playlists
  • QR code team sharing
Platform expansion 1
  • Android support (build profiles configured)
Get in touch

Got feedback, a bug report, or want to test early?

Goes straight to the builder. No team, no ticket queue — just me. I read every message and reply personally.

Your mail client will open with the message pre-filled. Prefer to write direct? dev@diamonddj.app

Principles

Built around the moment that actually matters.

We built this for ourselves first. Other apps left us fighting the tech instead of coaching the kids — and these kids deserve better. Every player should get their big-league moment, even on a 12U field with chain-link outfield fences. And the parents running scoreboards, the assistant coaches tracking lineups, the older sibling running audio from the dugout — they're the community that makes the season possible. This is for them too.

01

Never block the path

Open the app, build a team, play a song. No tutorial, no setup screens you have to fight through before first pitch.

02

Ready before first pitch

Cached roster. Cued audio. Stable Bluetooth. The app is warmed up before you are.

03

For the kid stepping up

The whole thing is built for one moment — that kid walking up to bat. If we get that right, we got it right.