since 2014 · sport, fitness & wellness mobile
Custom SportsTech & Fitness Mobile App Development — iOS & Android
FlexiApps builds custom SportsTech & fitness mobile apps in React Native — single-class booking marketplaces, live coaching platforms, activity tracking, gym management. iOS & Android from a single codebase. MVP delivered in 6 weeks for clients in the UK, Qatar, UAE and worldwide. Explore our React Native agency for full technical details.
Why build a custom SportsTech app in 2026?
The global fitness and SportsTech app market exceeds $14 billion in 2026, with 17% annual growth according to Grand View Research. In the UK, over 15 million people use a fitness app regularly, with 72% booking classes or tracking workouts via mobile (INSEP 2025).
Building a custom fitness app in React Native lets you deliver exactly the experience your brand demands — single-class booking, flexible memberships, live streaming — without the constraints of a SaaS like Mindbody, Glofox or TeamUp which charged between 2% and 5% commission on every payment in 2025.
FlexiApps has built sport and fitness iOS & Android apps since 2014 for clients in the UK (London, Manchester, Birmingham, Edinburgh), Qatar (Doha), the UAE (Dubai), USA, Canada, Australia and beyond. Our references portfolio includes Swet, a single-class fitness booking marketplace live on the App Store and Google Play.
Trusted by clients across the UK and worldwide
SaaS SportsTech vs custom development
Mindbody, Glofox or TeamUp are ready-made solutions. But if you want your own brand, your own data and zero platform commission, custom is the only answer. Ask our team for advice.
Mindbody / Glofox / TeamUp
Works for an independent studio starting out. Becomes a blocker when you want to scale or differentiate your brand.
Application sur-mesure React Native
The right choice once your volume justifies the investment — typically pays for itself in under a year against SaaS commissions. Voir notre references portfolio.
Flutter + Dart
FlexiApps masters Flutter at the same level as React Native. We'll advise you based on your project →
Our SportsTech & fitness app development services
From Figma wireframes to store deployment, we manage the full lifecycle of your sport app. Besoin d'une marketplace ou d'une app avec IA ? Nous maîtrisons ces cas d'usage.
Marketplace & class booking
Swet / ClassPass model — single-class multi-studio booking, class packs, Stripe Connect payments.
- Single-class or membership booking
- Class packs (5, 10, 20 sessions)
- Auto cancellation & waitlist
- Stripe Connect multi-vendor payments
- Push reminders 24h before class
Video coaching & live streaming
Live classes, replays, on-demand library. Mux or Agora integration for real-time streaming.
- Live HLS streaming (Mux / Agora)
- Replays & downloadable VOD
- Stripe recurring subscriptions
- Live chat & reactions
- Adaptive quality 4G/WiFi
Activity tracking & wearables
Activity tracking, Apple Health / Google Fit integration, Bluetooth connection to fitness devices.
- Apple HealthKit & Google Fit
- Bluetooth BLE (smartwatches, heart rate sensors)
- Activity history & charts
- Weekly goals & badges
- CSV / PDF data export
Custom fitness app already live — Swet
Swet is a real-world example of what FlexiApps delivers for the fitness sector — live on the App Store and Google Play.
Fitness marketplace · Paris
Swet
SWET is a mobile app that gives users instant access to premium fitness studios in Paris. It enables single-class bookings (yoga, boxing, pilates, cycling...) with no subscription required — just preferential rates and a seamless booking experience directly from their phone.
What we guarantee on every SportsTech project
Commitments written into the contract. Verify them in our references portfolio.
Contractualised timelines
MVP in 6 to 10 weeks, full app in 10 to 20 weeks. Written into the contract, real-time GitHub access. Testable build on TestFlight/Firebase at every bi-weekly sprint.
100% source code handover
Git repository, Figma files, technical documentation, third-party service access — everything is yours at delivery. No retention clause. You can continue with any team.
iOS and Android simultaneously
One React Native codebase deployed to the App Store and Google Play at the same time. OTA (Over-the-Air) updates for bug fixes without going back through store review.
GMT+1 — your timezone
Our nearshore team works in your timezone — London, Dublin, Manchester and beyond. Meetings in English or French, Slack, WhatsApp. Zero time difference.
Figma design validated before development
Every screen is prototyped and validated in Figma before the first commit. You see your app before it's coded — zero surprises at delivery. The Figma file is fully handed over.
Automated testing & dedicated QA
Jest unit tests, Detox E2E tests, manual QA on real iOS & Android devices. Code coverage >80% delivered with the project. GDPR and App Store guideline compliance included.
Our stack for sport & fitness apps
Every choice is justified by real-world experience — real-time performance, video streaming, geolocation and multi-vendor payments. Nos senior React Native developers have shipped high-traffic production apps.
Sport & fitness apps delivered — React Native use cases
Every vertical has its own technical requirements. FlexiApps has delivered or supported projects in each of these areas — the same building blocks powering multiple verticals simultaneously.
Single-class booking marketplace — fitness app development London
Custom fitness app development Swet / ClassPass model — multi-studio booking, class packs, Stripe Connect split payments. Live reference in Paris: Swet on the App Store →
Video coaching & live streaming
Live classes, replays, subscription VOD. Intégration Mux ou Agora for real-time streaming, Stripe recurring subscriptions.
Activity tracking & wearables
Activity tracking, Apple HealthKit, Google Fit, Bluetooth connection to heart rate sensors and smartwatches.
Personal trainer app
B2B tool for independent coaches — client tracking, custom programmes, in-app messaging, payments via Stripe, calendar and automated reminders.
Gym & sports club management app
Custom gym management app development — member app + manager dashboard, membership management, class scheduling, footfall analytics, invoicing. Ideal for multi-site clubs across the UK and Europe.
Nutrition & wellness with AI
Food diary, macro tracking, programmes combining sport and nutrition. Integration of IA agentique for personalised recommendations via OpenAI or Anthropic.
Why choose FlexiApps to build your fitness app?
FlexiApps is a nearshore mobile agency since 2014. GMT+1, English-speaking team, portfolio of 150+ apps delivered.
Nearshore pricing, senior quality
From £9,000 for a custom fitness app MVP, up to £70,000 for a full platform — where a London agency charges 2 to 3× more. Invoiced in GBP or EUR.
MVP live in 6 weeks
A React Native MVP (iOS + Android) delivered in 6 weeks. Full app in 10 to 20 weeks. Real-time GitHub access. Check our références.
Ready-made SportsTech modules
Booking, Stripe Connect, coach profiles, video streaming, tracking — we've already built these modules. Your budget goes on what differentiates your project, not on the plumbing.
Full ownership — code + Figma
Git, Figma, documentation, store credentials — everything is yours at delivery. No retention clause. You can continue with any team. Voir notre politique de confidentialité.
UK, Europe and worldwide
We work with clients in the UK, Qatar, UAE, USA, Canada, Australia and worldwide. Our team responds in English or French, knows GDPR and international compliance standards.
AI natively integrated
NLP virtual coach, personalised recommendations, performance analysis — our teams integrate IA agentique modules directly into your sport apps. Voir aussi mobile app with AI.
Real answers to your SportsTech questions
Estimate the cost of your sport & fitness app development
Budget in GBP, timeline in weeks. For a precise quote, contact our team.
Let's build your SportsTech app together
Fitness startup, independent coach or gym operator — our team replies within 24h in English or French. Devis gratuit, sans engagement. Consultez nos références et notre liste de clients avant de nous contacter.
FlexiApps · SportsTech & fitness mobile app development agency since 2014 · +212 66 00 11 456 · contact@flexiapps.net · See our references →