If you found this page, you probably already use Diamond Scheduler — or you tried it, hit the wall where the advanced features live in a desktop app, and started looking for something you could open from a browser. We built Big Sports for you.
What Diamond Scheduler does well
Diamond Scheduler has been doing this for twenty-plus years. The constraint set in their Pro and All-Star tiers is genuinely deep — minimum-rest windows, coach-conflict handling, venue prioritization, weekend balancing. That's not a back-of-the-napkin tool, and the people who built it understand the problem. SportsEngine integration ships out of the box, which matters if your league lives there.
For a single-coach use case or a small adult league, the price ($20 / $25 / $50 a month) is very fair. If your situation is "I run one division, I generate the schedule once in August, I email out a PDF," Diamond Scheduler is probably enough.
Where the season splits into two tools
Take a 22-team youth soccer club. You use Diamond Scheduler to generate the season in August, then run the rest of the season out of a Google Sheet. That second step is the tell: the tool that built the schedule is not the tool that maintains it.
Three things drive that split:
- The advanced rules need the desktop app. Diamond's web product is the introduction; the engine that handles the harder constraints lives in a separate desktop client you download. It works fine — at the desk it's installed on. What it means in practice is that the schedule can't be opened from any browser, on any laptop or phone, the way a web product can.
- There is no live re-optimization. When a field floods on Saturday at 6am, Diamond Scheduler does not propose make-up slots. You re-run generation (which usually changes more than you wanted) or you patch the spreadsheet by hand and email out a new PDF. That's the source of most "this version is wrong, use the v17 attached" parent-email chains.
- The version history is your inbox. Diamond Scheduler doesn't keep a built-in record of who changed what, or a one-click way to take a change back out. If you need that record — and at board-meeting time, you do — you keep it yourself, usually in a second document.
Where Big Sports is different
Big Sports runs the same kind of constraint engine, but continuously, from the browser, on every change. Drag a game to a new slot and the engine finds the fix and shows you a before-and-after list of what moved — before anything changes. Cancel a Saturday morning game in the rain, and the engine ranks make-up dates that don't break your rules. You're not re-running anything; you're picking from a ranked list and approving it.
Setup happens in one browser tab. Enter your teams, venues, dates, and the rules that actually govern your league — minimum rest, blackout dates, coach conflicts, doubleheaders — then generate. Same inputs, same schedule, every time: a director can defend the result to a board, a coach, or a parent without saying "that's just what the software did."
And every change is saved as its own step. Manual edits, drag-and-drop moves, engine re-runs — all of them land in one history with your name and the time on it, and a record of what moved. Undo takes the last one back out; the change history answers "what did we agree on Tuesday?" without a second document.
Pricing fit
Big Sports's Plus plan ($79/mo, $790/yr — two months free on the annual) sits above Diamond Scheduler's All-Star plan. We charge for it because Big Sports is designed to eliminate the spreadsheet that Diamond Scheduler users still rely on for everything after generation. Count what a season of patching the sheet costs you in evenings, and price it against that.
There's also a Free tier — one division, up to ten teams a season, two venues, and a watermark on your public schedule page. Running several divisions? Talk to us.
Try it
Start free. Twenty-one days of Plus, no card up front. Set up your divisions, venues, and rules in one sitting, and see what the engine does with them.