Case study · Sports

SportzOS: a league platform with live scoring across seven sports

Registration, payments direct to organisers, fixtures, live scoring and standings for tennis, pickleball, cricket, soccer, basketball, volleyball and baseball, in one app and one website.

Client: SportzOS
Platform: iOS, Android, web
Services: Mobile AppsWeb DevelopmentSaaSUI/UX Design
Technology: React NativeExpoNext.jsSupabaseStripeTypeScriptVercel

Overview

SportzOS is a league operating system for community and club sport. Players find and join leagues, pay the organiser directly, see fixtures and live scores, and keep a personal play log of their own matches. Organisers create leagues in any supported sport, approve team sheets, assign scorers and match officials, and publish standings.

The iOS app has been on the App Store since July 2026. The same codebase targets Android, and the website shares one backend with the app.

Client challenge

Every sport scores differently. Tennis has sets, tiebreaks and advantage rules. Cricket has overs, extras, run-outs and net run rate. Team sports have squads, approvals and a playing eleven per match. One generic model would have been wrong for all of them, and standings had to stay correct when a result was corrected after the fact.

User problem

Players wanted to register in a minute, pay once, know when and where they play, and see live scores without asking in a group chat. Organisers wanted the admin to disappear: registrations, payments, fixtures, standings and disputes handled in one place, with their own name on the fees.

Strategy

Build one platform with a sport module per sport rather than one scorer that pretends to cover everything. Keep money simple and honest: fees go to the organiser, and the platform is not the merchant of record. Ship the free tier first so individuals can log their own matches with no league at all.

UX

Five tabs in the app: Home, Player Hub, Play Log, Leagues and Locker Room. Scoring screens are built per sport so the scorer sees only the controls that sport needs. Organiser screens mask personal data by default; a player's contact details are revealed only when both sides opt in.

Architecture

Platform architecture

Experience
- iOS and Android (Expo)
- Next.js website
Backend
- SupabasePostgres, Auth, Realtime, row-level security
- Edge functions
Services
- Stripe (direct to organisers)
- Push and email

Development

An Expo React Native app with expo-router, a Next.js website, and one Supabase project with row-level security guarding every table. Scores publish over Realtime. Standings are recalculated from source results rather than patched incrementally, so corrections never drift. JavaScript updates ship over the air between store releases.

Key features

Individual and team registration with partner invites
Entry fees paid directly to organisers
Sport-specific live scorers
Standings with tie-breakers and net run rate
Match officials and duty-team draws
Public player profiles and personal play log
Organiser dashboard with masked personal data

Engineering challenges

01
Standings that stay correct under corrections
Incremental updates drift the moment a result is edited. The standings engine recalculates the whole table from source results, with per-sport tie-break rules, every time a result changes.
02
One identity across sports and surfaces
A player had been matched by name, so a namesake could appear as you. Identity now rests on the account, with public profiles keyed by a player ID derived from the account rather than the name.
03
Personal data locked down by policy
Organisers need to run a league without seeing more than they should. Row-level security plus masked views mean an organiser sees registrations, not phone numbers, unless the player chooses to share.
04
Passing store review
Account deletion from inside the app, user-generated content controls for match chat, and a clear liability waiver at registration were built to meet App Store requirements before launch.

Outcome

SportzOS has been live on the App Store since July 2026 and supports seven sports. Figures beyond those two are not published until they are verified.

Sports supported

Live since July 2026

App Store

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