Build a full 90-minute practice in under two. 237 curated drills with video, an AI planner that respects attention spans, a live in-game lineup board with pitch counts and rest-day rules — built by a coach who's stood on a Tuesday infield wondering what to run.
Practice prep, game-day scorekeeping, and player development — in one app, on your phone, in your back pocket.
Tell it age, focus areas, and total minutes. It picks drills from the library, balances the blocks, and drops them into a timed agenda. Reorder or remove any drill. Share the finished plan as a printable PDF.
Drag players onto a real baseball diamond, swap defensive positions inning-by-inning, set the batting order, and tap a result the moment a kid crosses home — single, double, walk, K. Your stat sheet writes itself.
Pitch count + rest day rules built in. Hit "+1" with each pitch. The app warns you at 80% of the league limit and blocks any pitcher who needs a rest day under Little League rules. No more parents pulling out the rule book in the parking lot.
9 or 10 fielders, your call. Toggle between standard 9-player and machine-pitch 10-player layouts (LF, LCF, RCF, RF) right from the field screen.
Every drill: step-by-step instructions, 4–6 coaching points, age range, equipment list, and a YouTube video so you see it run before practice.
Rate each player on eight skills. Trend sparklines show right on the roster screen — who's climbing and who's plateaued, no tap-in required.
Per-player batting — AB, H, HR, RBI, BB, K, SB. Log manually or drop in a GameChanger CSV or PDF and we auto-match to your roster.
Big +1 button as the pitch is thrown. League-aware limits by age group (50, 75, 85, 95). Throws ≥41 pitches today? The app blocks them tomorrow per Little League rest rules. Arms protected.
Schedule a practice and the app pings your phone two hours before with the plan title and drill count. One less tab open in your brain.
Set length, age group, and focus — "90 min, 10U, infield" — and Diamond assembles a full practice with warm-up, three themed blocks, water breaks, and a closer. Edit any block, save as a template, print a copy for the dugout.
Drop in a GameChanger export and we'll match every player to your roster automatically. No copy-pasting into a spreadsheet. No hand-entering at-bats at midnight.
GameChanger: Team Manager → Season Stats → Export CSV. Drop it in Diamond and we parse every player's AB, H, HR, RBI, walks, K's, steals — matched to your roster by jersey number first, then by name.
Share the scorebook PDF from any GameChanger game into Diamond. We read the line score, opponent, date, and every batter row — doubles, triples, HRs, steals, walks, K's — and stage it for your review before saving.
Auto-match gets ~95% right. For anything ambiguous — a first initial only, a shortened name — tap once to link to the right roster player. Nothing lands in your stats without your OK.
Volunteer dads, travel-ball coaches, and high school programs are using Diamond to plan faster, run tighter practices, and actually enjoy Tuesday nights again.
I used to spend an hour every Sunday night sketching practice plans on a legal pad or on my phone and I'd still show up Tuesday wondering what to run after BP. Diamond builds the whole thing in 90 seconds. Easily 3 hours back every week, and the kids are getting better-structured reps than I was giving them.
The AI planner knows my 8U kids can't stand still for 20 minutes. It actually paces drills for the age group. Saved me at least 4 hours a week.
I'm a dad first, coach second. Diamond gave me my Sundays back. Two taps, full plan, PDF to the assistant coaches. Game-changer.
I run two travel teams. Used to be 5–6 hours of planning a week between them. Now it's under 30 minutes total. The lineup builder is a bonus I didn't know I needed.
As a first-year coach with zero playing background, this app made me look like I knew what I was doing. The coaching points on every drill are gold.
No seats, no per-player fees. Cancel anytime in Settings.
Free to download. Three minutes to set up your team. Your first AI-built practice plan is ready before you finish your coffee.