How We Built GarageLeague
Weekend league organizers were running schedules, standings, and rosters out of spreadsheets and group chats — until one reschedule broke the whole system. Here's how we fixed that.

GarageLeague started from a familiar problem: weekend sports league organizers running everything — schedules, standings, rosters — out of a spreadsheet and a group chat. It worked, barely, until the first mid-season reschedule, at which point half the league found out about the change from a different person than the other half.
We built a scheduling-first league management app to fix exactly that failure point, for web and mobile together. Here's how the project actually went, from the first conversation to a live pilot season.
The problem: spreadsheets and group chats don't scale
A spreadsheet is a fine tool for a static schedule. It falls apart the moment something changes mid-season, because a spreadsheet has no way to notify anyone — someone has to manually message the league, and that message competes with everything else happening in a group chat. Reschedules, in particular, were the recurring breaking point organizers kept describing to us.
Shadowing real league nights before designing anything
Before any screens got designed, we sat in on actual weeknight league operations — watching how organizers actually managed a live schedule change, not how they described doing it after the fact. That gap between the described process and the real one is usually where the most important design decisions live.
What we saw confirmed the core problem but also surfaced a second one: standings updates were just as manual as scheduling, and just as easy to get wrong when someone forgot to update the spreadsheet after a game.
Designing around the organizer's actual week
Rather than designing a generic sports app, we built the information architecture around an organizer's real weekly rhythm: set up the season once, handle the reschedule that will inevitably happen, post standings after games without extra manual steps. Every screen exists to serve one of those three moments, not a hypothetical feature list.
Tip
When a workflow has one obvious point of failure — here, the reschedule — design the entire system around making that one moment bulletproof before polishing anything else.
Shipping web and mobile together against a shared API
Organizers needed a fast way to manage a season from a laptop; players needed schedule and standings in their pocket on game night. We built the marketing site and the React Native app in parallel against a shared backend, so both experiences stayed consistent instead of drifting apart the way separately built web and mobile products often do.
Piloting with a real league before general release
We ran a full pilot season with an actual grassroots league before opening the app more broadly. That pilot surfaced scheduling edge cases — weather cancellations, forfeits, double-headers — that never would have shown up in a demo environment, and every one of them fed back into the product before launch.
What changed for the pilot league
Schedules, standings, and rosters moved into one place instead of being split across a spreadsheet and a group chat. Reschedules now update the app instantly instead of relying on someone remembering to message everyone. The whole system was validated through a live, full-length pilot season with a real league before wider rollout — not just internal testing.
What we'd tell another team building something similar
Shadow the real workflow before designing a single screen — the actual failure point is rarely the one people describe first when you ask them directly. And pilot with real users doing real, high-stakes activity (a real season, not a sandbox) before calling anything finished; that's where the edge cases that actually matter show up.
FAQs
- How long did the GarageLeague build take?
- The full engagement — research, design, and building web and mobile together — ran about twelve weeks from kickoff to pilot launch.
- What tech stack did you use?
- Next.js for the marketing site, React Native for the mobile app, and PostgreSQL on the backend, with both experiences built against a single shared API.
- Why build a custom app instead of using an existing league platform?
- Existing tools didn't handle the specific reschedule-and-notify workflow well, which was the actual failure point organizers were hitting — a common reason to build custom over off-the-shelf, covered in more depth in Custom Software vs. SaaS.
- Do you build both the web and mobile sides of a product like this?
- Yes — we typically build both against one shared backend so the two experiences stay consistent, rather than handing mobile off as a separate project later.
Building something like this?
If you're wrangling a real workflow out of spreadsheets and group chats, let's talk about what a purpose-built app would actually look like.
Related case study
ApplicationsGarageLeague
2025A league management app and marketing site for grassroots sports organizers, built for fast weekly scheduling.
- Next.js
- React Native
- PostgreSQL
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