Great experience working with this team. They completed the development work quickly and efficiently without wasting time. Communication was clear and consistent, they understood the requirements well, gave smart suggestions, and delivered exactly as discussed. I'd highly recommend them to anyone looking for a reliable, fast, and skilled app development team.
Ludusio: A Marketplace Connecting Athletes and Coaches
Ludusio is a native iOS and Android athletic coaching marketplace that puts every verified coach on one screen, handles scheduling in real time, and tracks progress session by session. Mobilions built three role-based apps on one backend, with the scheduling intelligence on the server so every booking stays accurate.

Project Overview
What Ludusio is and what Mobilions built across three user roles.
Ludusio is an athletic coaching marketplace that closes a real gap in training: athletes waste hours hunting for qualified coaches, juggling phone calls and comparing prices by hand. Ludusio puts every verified coach on one screen, handles scheduling in real time, and tracks progress session by session, so athletes can spend their energy training rather than searching.
Mobilions built three native apps on one backend, covering three user roles — athletes, coaches and admins. The iOS app is built in Swift and the Android app in Kotlin, with a custom PHP backend on AWS and a MySQL database owning the scheduling logic, user accounts and payment state.
Building both apps natively kept the experience sharp on each platform, while putting the scheduling intelligence on the server is what keeps every booking accurate.

Client Snapshot
The essential facts about the product and its audience.
Sports and fitness
iOS (Swift), Android (Kotlin)
Information not available in source documents.
Information not available in source documents.
Services Delivered
The scope of work Mobilions delivered on the project.
- App development (native iOS and Android)
- UX and UI design
- Backend development
- API integration
- Deployment and maintenance
Technology Stack
The core technologies behind the apps, backend and infrastructure.
- Swift (iOS)
- Kotlin (Android)
- Custom PHP (backend)
- MySQL (database)
- AWS (infrastructure)
The Challenge
The business and technical problems the build had to solve.
Business Challenge
Athletes waste hours hunting for qualified coaches, juggling phone calls and comparing prices by hand. Ludusio had to put every verified coach on one screen with the information that matters — specialties, certifications, transparent pricing and verified reviews — so the right match surfaces in seconds and athletes can book with genuine confidence.
Technical Challenge
The booking system had to adapt to schedules that are never the same twice: every coach sets different availability windows, session lengths and blackout dates, and athletes in different time zones need accurate open slots without confusion. The platform also had to handle many simultaneous bookings without conflicts — two athletes booking the same coach at the same moment cannot both succeed — and one data model had to flex across every sport, with different pricing for public and private sessions, without becoming brittle.
Our Approach
How Mobilions structured the marketplace and its scheduling intelligence.
Discovery
Information not available in source documents.
Architecture
Swift on iOS and Kotlin on Android handle the booking flows, coach browsing and session management, while a custom PHP backend on AWS with MySQL owns the scheduling logic, user accounts and payment state. The scheduling intelligence lives on the server so every booking stays accurate.
Execution
The team built a backend calendar engine that merges coach availability, existing bookings and time-zone offsets into one clean feed, a server-side reservation lock to handle concurrent bookings, and a flexible session model that stores sport type, visibility, duration, price and coach-specific rules in one normalized structure.
Engineering Decisions
The key decisions that shaped the product and why they were made.
Backend calendar engine for varying availability
A calendar engine on the backend merges each coach's availability, existing bookings and time-zone offsets into a single clean feed. Athletes only see slots that are genuinely open, updated in real time as bookings land, so the complexity is absorbed by the server and never reaches the athlete as confusion.
Server-side reservation lock for concurrency
A server-side reservation lock holds a slot for 60 seconds while the athlete confirms, and releases it if the window expires. Two athletes can never both succeed on the same slot, and it happens automatically, eliminating double bookings without any manual admin intervention.
Flexible normalized session model
A flexible session model stores the sport type, visibility (public or private), duration, price and coach-specific rules in one normalized structure. Adding a new sport or pricing tier becomes a configuration change rather than a code change, so the platform flexes across every sport without becoming brittle.
Technology Considerations
Why the stack was chosen and the tradeoffs it carries.
Why These Technologies
Native Swift and Kotlin builds keep the experience sharp on each platform for booking, browsing and session management, while a custom PHP backend on AWS with MySQL owns the scheduling logic, user accounts and payment state — putting the scheduling intelligence on the server is what keeps every booking accurate.
Tradeoffs
Building both apps natively (rather than sharing a codebase) was chosen to keep the experience sharp on each platform. Three coherent role-based experiences were built on one backend, which is what makes the marketplace work for athletes, coaches and admins at once.
Scalability Considerations
The reservation lock-and-confirm logic was designed to hold up and scale under load, not just on a quiet afternoon, so the platform handles many simultaneous bookings without conflicts.
Implementation Highlights
The features that define the day-to-day experience.
Coach discovery
Athletes filter a curated roster of verified coaches by sport, location, rating and hourly rate, with every profile showing credentials, a gallery, specialties and verified reviews from past athletes. Finding the right coach becomes a matter of seconds rather than an afternoon of phone calls.
Real-time booking
Athletes pick a date and time slot and confirm in seconds, with the calendar merging coach availability and existing reservations so only genuinely open slots appear. The real-time nature removes the friction that kills most booking flows, with no double bookings and no phone tag.
Three roles and ratings/reviews
Athletes browse and book, coaches manage schedules and training plans, and admins oversee everything, each with a tailored experience on the same platform. After every session, athletes rate their coach and leave a review, building a public track record that helps new athletes choose with confidence — the trust engine of the platform.
Key Engineering Highlights
A technical summary across architecture, data, performance and security.
Architecture
Native Swift (iOS) and Kotlin (Android) clients on a single custom PHP backend, with AWS infrastructure and MySQL owning scheduling, accounts and payment state across three user roles.
Data Layer
A normalized, flexible session model stores sport type, visibility, duration, price and coach-specific rules, so new sports and pricing tiers are configuration changes rather than rewrites. MySQL holds the scheduling, account and payment data.
Performance
A backend calendar engine resolves availability, blackout dates, existing bookings and time-zone offsets into one real-time feed, and a 60-second reservation lock resolves concurrent booking attempts cleanly under load.
Security
Information not available in source documents.
Information not available in source documents.
Gallery
A look at the product across screens.
Ready to build something like Ludusio?
If you need a marketplace, booking or sports app with real-time scheduling, multiple roles and a backend that handles concurrency cleanly, let us show you how we would build it.
What Clients Say
Mobilions' clients describe fast delivery, clear communication, and senior, trustworthy engineering—in their own words.
We worked with Ankit, Mayur, and Tushar to build the first version of Baba Hebrew for iOS and Android, and they delivered super fast. The team was responsive, reliable, and efficient, taking the idea from zero to a working app in record time. I'd recommend them to anyone who wants to get an MVP live quickly.
Tushar and Ankit did an outstanding job developing our native iOS (Swift) and Android (Kotlin) apps. They were efficient, responsive, and technically strong throughout. Thanks to their work, we launched successfully and gained over 1,000 users in the first 30 days. Highly recommend this team for quality mobile app development.
It was a wonderful experience working with Tushar, Ankit, and their team. They built a great mobile app for me and truly brought my vision to life. What stood out was not just their technical skill but their attitude: always positive, solution-oriented, and incredibly patient. They went above and beyond at every step, finding creative workarounds and staying committed even when things got challenging. Extremely professional and trustworthy. I would absolutely hire them again.
Great experience working with this team. They completed the development work quickly and efficiently without wasting time. Communication was clear and consistent, they understood the requirements well, gave smart suggestions, and delivered exactly as discussed. I'd highly recommend them to anyone looking for a reliable, fast, and skilled app development team.
We worked with Ankit, Mayur, and Tushar to build the first version of Baba Hebrew for iOS and Android, and they delivered super fast. The team was responsive, reliable, and efficient, taking the idea from zero to a working app in record time. I'd recommend them to anyone who wants to get an MVP live quickly.
Tushar and Ankit did an outstanding job developing our native iOS (Swift) and Android (Kotlin) apps. They were efficient, responsive, and technically strong throughout. Thanks to their work, we launched successfully and gained over 1,000 users in the first 30 days. Highly recommend this team for quality mobile app development.
It was a wonderful experience working with Tushar, Ankit, and their team. They built a great mobile app for me and truly brought my vision to life. What stood out was not just their technical skill but their attitude: always positive, solution-oriented, and incredibly patient. They went above and beyond at every step, finding creative workarounds and staying committed even when things got challenging. Extremely professional and trustworthy. I would absolutely hire them again.
Frequently Asked Questions
Answers to the questions buyers ask before commissioning a build like this.
It depends on scope. The cost of a build like this is driven by scope, features, integrations, compliance requirements, team composition, and infrastructure complexity. We provide a fixed estimate after a short discovery call once those are defined.
A backend calendar engine merges each coach's availability, their existing bookings and time-zone offsets into one clean feed, so athletes only ever see slots that are genuinely open, updated in real time as bookings land. That is what removes the double bookings and phone-tag that make manual scheduling painful.
Yes. Ludusio is built so each coach can define their own session types, lengths and prices to fit their sport, and athletes can choose formats such as public or private. The flexible model means one platform handles the full variety of sports without forcing every coach into the same template.
With a server-side calendar engine that absorbs the complexity. It combines availability windows, blackout dates, existing bookings and time zones, and resolves concurrent booking attempts cleanly so a slot can never be double-booked. The athlete simply sees accurate, genuinely open times.
Coaches need a rich profile with credentials and gallery, schedule and availability management, session and pricing setup, a clear view of upcoming and past bookings, and the ability to update training plans and respond to reviews. In Ludusio the coach experience is tailored to running their practice, not just receiving bookings.
A native coaching marketplace like Ludusio typically takes around five to seven months from concept to launch, given the booking engine, multiple roles and two native apps. We work in two-week sprints with working software throughout, so progress is visible rather than going quiet until launch.
It depends, and both work. A single app with role-based experiences keeps everyone on one platform and is often simpler to maintain, which suits many marketplaces. Separate apps can make sense when the two sides are very different. We help you choose based on your audience rather than defaulting to one.
Each session is logged, coaches update training plans after sessions, and athletes can review past trainings and see their growth over time from a single dashboard. Turning a series of bookings into a visible journey of improvement is part of what keeps athletes engaged and coming back.
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