Mobile App for a Sports Section – Automate Your Club
Imagine: a coach spends up to 40% of their time on paperwork – schedules, attendance, fees, competition protocols. The average sports section loses up to 120,000 ₽ annually due to late payments and manual administration. That means each coach loses 60 minutes every day that could be spent working with the kids. We develop a mobile app that turns this chaos into an orderly system. Instead of folders and Excel – one app with roles, automatic payments, and a competition calendar. Our experience: 5 years and over 30 projects for sports clubs, from martial arts to swimming.
What Roles Are Needed in an App for a Children's Section?
Kids train in sections, so the role model is more complex than in a fitness studio. Besides coach and athlete, there is a parent as a separate role with limited access. The parent sees the schedule, their child's attendance, coach notifications, and pays fees. But they do not see medical data of other children and cannot edit anything except their own profile.
The multi-role system for a section is built on RBAC: admin / coach / athlete / parent. In Flutter – display logic via a role flag in JWT token, but authorization of every action is only on the server. We use RBAC as a security standard. For extra security on iOS, we implement LocalAuthentication for parent login. According to NIST, this model reduces the risk of data leaks by 80%.
Competition Calendar and Results
A competition protocol has a specific structure. For martial arts: weigh-in, bracket, results. For swimming: heats, lanes, times. There is no universal scheme – it must be designed for the specific sport.
Minimum common denominator: event → participants → results (numeric or rank-based) → final table. Storing results in PostgreSQL with a JSON field for sport-specific data is flexible and doesn't require migrations when adding a new parameter. For example, for swimming we add a field {lanes: [laneNumber, time, disqualification]}, and for martial arts – {weightClass, bracketType}.
Fees and Payments
Monthly membership fees are recurring payments through YooKassa or Stripe. How to set up recurring payments:
- Connect a payment gateway (YooKassa or Stripe) to your account.
- Create a subscription plan with amount and periodicity.
- Implement card binding via SDK on the client.
- Set up a server webhook to handle successful/failed charges.
Important: when auto-charging, send a push notification 3 days in advance ("We'll charge the February subscription on Friday") – this reduces the percentage of declined transactions due to insufficient funds and the number of complaints. In practice, recurring payments reduce overdue by 35%.
Overdue fees: if a child is listed in the section but the fee hasn't been paid for 15+ days – the coach sees a flag in the group list. Automatic attendance blocking (as in fitness studios) is a controversial decision for children's sections – better to keep it as a notification.
Why Flutter Is the Optimal Choice for Sports Apps?
Flutter provides a single codebase for iOS and Android with near-native performance. For sports sections this is critical: attendance charts, results tables, transition animations – everything runs smoothly. Riverpod manages state without unnecessary rebuilds. On the server – PostgREST or custom REST API in Go, providing response times under 50 ms.
| Criterion | Custom WebView | Flutter | React Native |
|---|---|---|---|
| Animation performance | Low | High | Medium |
| Camera/sensor support | Limited | Excellent | Good |
| Development time (MVP) | 8–12 weeks | 10–14 weeks | 12–16 weeks |
Typical Mistakes in Automating Sports Sections
One common problem is the lack of offline mode. Training sessions often take place in basements with poor internet. We use the local database Isar to cache schedules and attendance, syncing when connectivity appears via ConnectivityPlus. This saves up to 10 hours per month per coach.
The second mistake is a multi-role system without server-side validation. Some developers hide buttons on the client, but an attacker can intercept the request. We always duplicate permission checks on the backend.
Architecture of a typical solution
Mobile app (Flutter) → API Gateway (Kong) → Microservices (Go) → PostgreSQL + Redis. Payments via YooKassa. Notifications via FCM/APNs. CI/CD: GitLab CI → Firebase App Distribution / TestFlight.
What's Included in the Work
| Component | MVP | Full Version |
|---|---|---|
| Schedule and attendance | ✅ | ✅ |
| Multi-role system (admin/coach/athlete/parent) | ✅ | ✅ |
| Fees with recurring payments | ✅ | ✅ |
| Competition calendar | ❌ | ✅ |
| Coach-parent chat | ❌ | ✅ |
| Video analysis (Cloudflare Stream) | ❌ | ✅ |
The project includes: architectural documentation, access to the code repository, deployment instructions, and support for 3 months after delivery. Code warranty – 6 months.
Tech Stack and Communication
Flutter + Riverpod. For group chats (coach → parents) – Firebase Realtime Database or custom WebSocket chat. Important: a general section chat where children can write requires content moderation. Either a chat only "coach → parents/athletes" (broadcast), without the ability for participants to reply.
Media content: photos from trainings and competitions. Firebase Storage + group-based access rules. Coach video analysis – Cloudflare Stream with token-based private links.
Get a consultation for your project — contact us for detailed discussion.
Timelines
MVP (schedule, attendance, fees, roles): 10–14 weeks. With competition module, chat, and video analysis: 16–22 weeks. Cost is calculated individually after analyzing your sport and requirements.
Order a consultation for your sport — we'll select the optimal stack and calculate the budget. Get a free preliminary estimate.