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We’ve built an iOS mobile app called THTC+, an AI-powered motion activity tracker that uses the phone camera to detect 17 body keypoints, count repetitions, derive metrics such as speed and cadence, and track user progress over time. The prototype is live, users love it, and now I need a reliable development partner to help finalize the product. I am looking for a developer or a development company to: Refactor and complete the iOS App. Build a web platform for trainers, gyms, and organizations. Integrate a subscription/billing model (Stripe). Improve backend (Firebase) architecture and scalability. Below is the detailed scope. ABOUT THE PROJECT THTC+ is available for free on the Apple App Store. It uses AI to analyze body movements and track workout performance. It also includes a Partner Network where gyms and trainers can appear on a map, users can enroll in organizations, and trainers can assign workouts. I now want to take the product to the next level: Production-ready mobile app + full partner web platform + subscription model. SCOPE OF WORK 1. iOS Mobile App (Existing Code) Improvements required: Full code refactor (clean architecture, remove technical debt, improve modularity). UI/UX redesign based on existing or new Figma. Improve AI/pose detection stability (models already available). Improve repetition detection accuracy. Implement more advanced metrics (speed, cadence, range). Enhance video recording quality and compression. Improve charts and historical analytics. Improve the Partner Network integration (map, branding per organization, user flows). App Store-ready version. Tech stack: Swift / SwiftUI / CoreML / AVFoundation / Firebase. 2. Web Platform for Trainers, Gyms, and Organizations A new web dashboard is required: Authentication and roles (Admin, Trainer, User). Organization creation and management. Add/Remove trainers. Approve/Remove users enrolled from the mobile app. Workout creation and assignment to users. Analytics dashboard (engagement, progress, metrics). Custom branding for each organization (logo + theme). Stripe subscription integration for organizations. Invoices, billing portal, trials, payment methods. Preferred tech stack: React / [login to view URL] (or similar) + Firebase + Stripe. 3. Backend / Infrastructure Current backend: Firebase (Firestore, Functions, Authentication, Storage) Required: Full data model review. Improve Firestore structure for scalability. Write Firebase Functions for: Workout assignment Analytics aggregation Stripe webhook events Strengthen authentication and Firestore security rules. Ensure GDPR-ready user data flows. 4. Documentation Mandatory: Technical documentation API/data model documentation Architecture diagrams Setup & deployment instructions QA test plan Admin manuals for gyms and trainers WHAT I AM LOOKING FOR A partner with: Experience in iOS development (Swift + AI/ML integrations). Experience building dashboards/web apps (React/NextJS preferred). Strong Firebase experience. Stripe subscription experience. UI/UX capabilities. Good communication and accountability. Ability to propose improvements, not only execute tasks. Bonus if you have experience with: Pose detection models Health or fitness applications Camera-based apps Video processing DELIVERABLES Refactored and stable iOS app ready for App Store. Fully functional Partner Web Platform. Stripe subscription + billing portal integration. Improved and secure Firebase backend. All required documentation. 3-month warranty for bug fixing. PROPOSAL SHOULD INCLUDE Portfolio and relevant projects Technical approach and architecture vision Timeline and milestones Team structure (if applicable) Budget estimate (fixed price preferred) Maintenance/support options HOW TO APPLY Please respond with: Your experience with Swift, Firebase, and Stripe. Links to similar apps or platforms you’ve built. Your estimated timeline. Your estimated total cost.
ID do Projeto: 39994984
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140 freelancers estão ofertando em média €4.061 EUR for esse trabalho

Hello! I understand you need a trusted partner to refine the THTC+ mobile app and create a robust web platform for trainers and gyms. Your existing iOS app needs a full code refactor and improved features like better AI detection, UI/UX updates, and subscription integration through Stripe. For the web platform, we’ll build an intuitive dashboard for trainers, focusing on user management and personalized branding. My approach combines strong UI/UX design with efficient backend improvements using Firebase for scalability. I'll ensure all necessary documentation and maintain reliable communication throughout the project. What is the timeline you have in mind for completing all the project phases?Looking forward to your response!
€5.000 EUR em 22 dias
8,8
8,8

I have over 7 years of experience in iOS development with expertise in Swift and AI/ML integrations. I understand the challenges you face with finalizing the THTC+ mobile app and web platform. In the past, I have successfully delivered projects in the health and fitness domain, with a focus on innovative technology solutions. My experience aligns perfectly with the requirements outlined for this project. I am confident in my ability to refactor the iOS app, build the web platform for trainers and gyms, integrate the Stripe subscription model, and enhance the backend architecture for scalability. My technical expertise in Swift, Firebase, and Stripe, coupled with my track record of delivering top-notch solutions, makes me the ideal partner for your project. If you choose to collaborate with me, you can expect a production-ready mobile app, a feature-rich web platform, seamless integration of subscription billing, and robust backend infrastructure. I am committed to excellence and will ensure that all deliverables meet your expectations. I am excited about the opportunity to work on the THTC+ project and take it to the next level. Let's discuss further details and kick-start this journey together.
€4.000 EUR em 45 dias
8,1
8,1

Hi there, I'm Lei, a software developer with over 18 years of experience. I have carefully reviewed your project requirements for the THTC+ Mobile App & Web Platform Development. With my expertise in mobile development, particularly in iOS and Flutter, I am confident in delivering high-quality solutions. My background in backend development also ensures robust performance and seamless integration. You can find examples of my work in my portfolio: https://www.freelancer.com/u/mikelilei82 I invite you to initiate a chat to discuss your project further. Thanks, Lei
€3.000 EUR em 30 dias
7,6
7,6

Hello Dear, As a 10 years highly experienced full-stack developer with a strong track record of delivering high-quality, reliable, and scalable platforms across web and mobile. I can take your THTC+ project from prototype to production-ready by refactoring and completing your iOS app, building a full-featured web platform for trainers and gyms, and integrating a Stripe subscription model. I will improve the backend Firebase architecture for scalability, strengthen security rules, and ensure GDPR-compliant data flows. The mobile app will include refined AI/pose detection, enhanced metrics, better video recording, and polished charts, while the web dashboard will allow organizations to manage users, workouts, analytics, and custom branding seamlessly. I will deliver complete technical documentation, deployment instructions, and a QA plan, with a 3-month warranty for bug fixes. The final product will be fully stable, scalable, and ready for App Store launch. I’ve gone through your project details carefully, I do have a few questions related to your project, so let’s connect and discuss everything in more detail. Once you come on chat, I’ll share a complete document with you that includes everything mentioned about the project, such as details, milestones phases, and the timeline. Please Take a Look at My Professional Portfolio: https://www.freelancer.pk/u/zainalitariq245 I look forward to your response. Best Regards, Zain
€3.000 EUR em 7 dias
6,3
6,3

Hi, With years of experience in both iOS and web development, I bring to the table an expansive set of skills that align perfectly with your project's needs. My in-depth understandings of Swift, Firebase, Stripe, and my strong command in UI/UX capabilities make me the perfect candidate for your THTC+ Mobile App & Web Platform Development. I've successfully built intricate dashboards/web apps and have streamlined complex functionalities like authentication & roles, billing portability, and workout assignment management in similar projects before. But it's not just about the skills; it's also about the mindset. As a developer, I firmly believe that executing tasks is not enough; it's about adding value by proposing improvements. This unbeatable attitude has earned me satisfied clients in the past. Also as part of my offerings, I provide a 3-month warranty for bug fixing proving my dedication to delivering quality projects. Moreover, I've noticed you appreciate good communication and accountability. Excellent! Because client satisfaction is my top priority! I will keep you updated with real-time progress reports using tools like Figma that we have both proficiency in. Above all comes my budget-friendliness which I believe is crucial. Thanks...
€4.000 EUR em 25 dias
6,3
6,3

Hello there Hope you are doing well as you are looking for a "Build a MOBILE APPLICATION " so will make the same as you want , I have already develop and Design the so many Application , - I will use latest technology to develop your Application - I will share daily update with you - I Will deliver your project within timeline - After project completion will share complete source code - I will provide 1 year support our develop work - I have 10+ year experience in Web & App development - I will make the 100% responsive design , fast loading , SEO friendly and all - I will provide you super admin panel there you can manage the whole thing Please initiate the chat so will discuss together and all Thanks & Regards Dheeraj K.
€3.000 EUR em 25 dias
7,0
7,0

Hello, I can help take THTC+ from a working prototype to a fully production-ready ecosystem across iOS, web, and Firebase. I have strong experience with Swift/SwiftUI, CoreML pose detection, scalable Firebase architectures, and Stripe subscription integrations, making me a great fit for both the mobile refactor and the trainer web platform. I can deliver clean architecture, upgraded AI accuracy, a polished UI/UX, and a secure, documented backend ready for scale. I’ve built fitness and camera-based apps before and can outline a clear timeline, milestones, and technical approach upon discussion. Ready to collaborate as a reliable, long-term development partner.
€4.000 EUR em 7 dias
6,0
6,0

Please initiate the chat so we can thoroughly discuss the requirements for the app, prior to the start. Happy to provide the final budget in chat. You will get a one-stop solution from my end as, throughout my 5+ years of freelancing Android/iOS App development career, I have created plenty of Mobile applications. I ensure to give the best quality app with good performance and responsive attractive UI and I have provided the clients with excellent results. I have expertise in Swift, React Native, Node.js, React.js, Angular, Laravel, and PHP. I am equipped to develop apps using these languages in all industries Pharmaceutical, Travel, Media & Entertainment etc. I also handle backend integrations for third-party collaborations on your systems. well versed in Mobile App Development in-App-Purchases, User Authentication, User Profile Creation, Location, Chat and Messaging, Map Integration, Payments, Social Media Account Integration, and many more to show. Have considerable knowledge of Android ANT SDK, BLE, Google Cast SDK, ads SDK, offerwall SDK and Titanium. I use libraries such as Sherlock Action Bar, OpenGL, Media Framework, and WebKit to build IoT integration app solutions. I am always interested in making long term professional relationships with my clients to ensure that every project becomes successful. So, if you hire me, I can assure you that you will not regret your decision. Best Regards Tejash J.
€4.000 EUR em 7 dias
5,8
5,8

This sounds like something I’d genuinely enjoy building. The vision for THTC+ to evolve into a polished, fully integrated platform for trainers and users aligns perfectly with my expertise. I specialize in streamlining mobile and web applications, ensuring they are intuitive and user-friendly while enhancing backend scalability. With extensive experience in Swift, Firebase, and Stripe, I have a proven track record of delivering practical, measurable results that elevate user engagement and satisfaction. Happy to outline how I would turn this plan into a working solution. Chat soon, Anne S
€3.500 EUR em 7 dias
5,8
5,8

Hi there, I am excited about the opportunity to partner with you on the THTC+ project. As a top California freelancer with extensive experience in iOS development, particularly with Swift and AI integrations, I have successfully completed numerous projects similar to yours, earning consistent five-star reviews. I understand the critical importance of refactoring your existing app to enhance its modularity and performance while integrating a robust web platform for trainers and organizations. Your vision for the THTC+ mobile app and web platform aligns perfectly with my expertise. I am experienced in implementing subscription models with Stripe, enhancing backend architectures with Firebase, and creating intuitive UI/UX designs. I assure you that I am not just a task executor but a proactive partner who will propose innovative improvements throughout our collaboration. I’d love to discuss this further. What specific features or metrics are you looking to prioritize in the web platform? Thanks,
€4.885 EUR em 7 dias
5,3
5,3

Hello, As a seasoned full-stack developer and airtight leader in the field with over a decade of experience, I believe I'm the ideal candidate for your THTC+ project. My reputation speaks for itself, with a portfolio full of successful applications similar to yours that have been embraced by hundreds of thousands of users. These include React-driven platforms that required precise UI/UX design and optimization holistically; skills crucial for developing an integrated motion-tracking mobile app like yours. Not only can I bring stability to your iOS codebase with my proficiency in Swift, but I will also amplify its features through careful, yet significant revisions such as improving AI detection, UX enhancements, and advanced metric implementation. Moreover, your Partner Web Platform would be in excellent hands as I've efficaciously incorporated comparable functionalities in past projects by leveraging technologies like React and Firebase. In terms of budgeting and the maintenance phase, it’s my standard practice to offer a fixed price along with various flexible support plans so that you get the right deal without compromising on quality or future troubleshooting rendezvous. With me at the helm, you can expect meticulous testing and documentation phases which include full admin manuals, fitting software architecture diagrams, and inclusive test plans - ensuring every desired specification is met precisely and every aspect of your Thanks!
€3.000 EUR em 30 dias
5,1
5,1

Hello, I am a Mobile App Developer with 15+ years of experience, specializing in building high-quality, user-friendly, and feature-rich applications for both Android and iOS platforms. I create apps with modern UI/UX, smooth performance, and cross-platform compatibility to ensure the best user experience. My expertise includes custom mobile apps, API integration, push notifications, real-time features, and app optimization. Recently, I also worked on OpenAI API integration for auto-generated content, images, and social sharing, which shows my ability to adopt the latest technologies in mobile solutions. If you are looking for a dedicated Mobile App Developer who ensures quality, innovation, and timely delivery, I’d be glad to work on your project. Best regards, yogesh
€3.000 EUR em 7 dias
5,1
5,1

With THTC+, you need a technical hand that's well-rounded and experienced, and that's where I come in. As an accomplished Software Engineer specializing in Backend and iOS Developments, I bring with me an advanced skill set that matches your project's needs exactly. My proficiency in Swift, Firebase, and Stripe aligns perfectly with your requirements for refactoring the mobile App, building a solid web platform, integrating subscription models, and enhancing backend architecture. In addition to my technical expertise, I believe communication, accountability, and proposing improvements are critical aspects in any successful collaboration; qualities I strictly abide by. My sharp UI/UX capabilities would further aid me in tackling the redesign part of your project effectively. So let's take THTC+ to new heights together - a production-ready app with a full-functioning web platform, streamlined billing system all supported by a fortified Firebase infrastructure. Expect clear documentation and pristine code from me along with 3-month warranty for bug fixing.
€5.000 EUR em 60 dias
4,7
4,7

Hey fastsat, I am thrilled to take on the THTC+ project, an innovative AI-powered motion activity tracker. With over 12 years of experience in Full-Stack Development, I am equipped to bring your vision to life. I propose to refactor and enhance the iOS app, develop a comprehensive web platform for trainers and organizations, integrate a seamless subscription model via Stripe, and optimize the Firebase backend for scalability. My goal is to deliver a polished mobile app, a feature-rich web platform, and a robust backend system that meets your needs. For the next steps, I envision a collaborative journey to refine the app, design a user-friendly web platform, and streamline the backend processes. How can we proceed to align on the project specifics? How do you envision the collaboration process moving forward?
€4.530 EUR em 34 dias
4,4
4,4

Hi, For the AI/pose detection, should the app continue using on-device CoreML models, or are you open to a hybrid approach with server-side inference to improve stability and accuracy for edge cases? For the Partner Web Platform, should we support multi-tenancy (each organization isolated in data and branding) from day one, or a single-tenant dashboard with role-based access for multiple gyms? Regarding Stripe billing: do you require per-user subscriptions, per-organization subscriptions, or both? Should we support trials, coupon codes, and automatic recurring payments for organizations? I will refactor the iOS app using Swift/SwiftUI with clean architecture, modular code, and optimized CoreML integration for pose detection. Improvements will include repetition detection, advanced metrics (speed, cadence, range), video recording optimization, and enhanced analytics charts. Partner Network flows will be reworked for usability and reliability, with App Store-ready packaging, CI/CD, and automated testing. Firebase backend will be redesigned for scalability, with secure authentication, Firestore structure optimization, Cloud Functions for analytics and assignment, and GDPR-compliant rules. Let's have a chat to discuss further. Thanks
€4.000 EUR em 7 dias
4,3
4,3

Hello there, I understand that you are seeking a reliable development partner to assist in finalizing the THTC+ mobile app and web platform. The project involves refactoring and completing the iOS app, building a web platform for trainers and gyms, integrating a subscription/billing model, and enhancing the backend architecture for scalability. Proposed Solution: I propose to refactor the iOS app, develop a comprehensive web platform for trainers and gyms, integrate the Stripe subscription model, and enhance the backend infrastructure using Firebase. Our team will focus on improving UI/UX design, stability of AI/pose detection, accuracy of repetition detection, and implementation of advanced metrics. Key Deliverables: 1. Refactored iOS mobile app 2. Fully functional web platform for trainers and gyms 3. Integration of Stripe subscription/billing model 4. Enhanced and secure Firebase backend architecture Portfolio & Skills: I bring expertise in iOS development, Firebase, and Stripe integration. Our team has experience in building user-friendly dashboards and web applications using React and Next.js. We excel in communication, accountability, and proposing innovative solutions. Call to Action: I would love to discuss your project in more detail and share our portfolio with you. Kindly, ping me in the DM for further communication. Best regards, Bilal
€4.000 EUR em 7 dias
4,1
4,1

Dear , I am excited about the opportunity to collaborate on the development of THTC+ and take it to the next level. With a focus on refactoring the iOS app, building a comprehensive web platform, integrating Stripe subscriptions, and enhancing the Firebase backend, I am confident in delivering a top-notch solution that aligns with your project goals. Our team has extensive experience in iOS development using Swift, AI/ML integrations, and building web applications with React and Next.js. We have a strong background in Firebase and have successfully integrated Stripe subscriptions in previous projects. By focusing on clean architecture, improved UI/UX, and robust backend infrastructure, we aim to deliver a production-ready mobile app, a feature-rich web platform, and seamless integration with Stripe. Our approach includes thorough documentation, regular communication, and a proactive mindset towards proposing enhancements. I look forward to discussing your project in more detail and showcasing how we can bring your vision to life. Please find our portfolio and relevant projects in the attached links. Thank you for considering our proposal. Best regards,
€3.000 EUR em 7 dias
4,0
4,0

Hello, I’ve reviewed your full THTC+ scope and I can help you take the product to a production-ready level. I work with Flutter/iOS, Firebase, AI-based apps, dashboards, and subscription systems, so the workflows you described fit well within my expertise. Here’s what I can deliver for you: A clean and refactored iOS app (Flutter/AI improvements, UI/UX, stability, App Store-ready). A full web platform for trainers/gyms with roles, workouts, analytics, and branding. Stripe subscription + billing portal setup. A scalable Firebase backend with improved structure, functions, and security. Complete technical documentation for future expansion. I prefer simple and reliable communication, and I focus on delivering a smooth, ready-to-launch product instead of just completing tasks. If you'd like, we can discuss the technical approach, timeline, and costs in chat.
€3.500 EUR em 5 dias
3,9
3,9

My dear prospective client, Let's come to on a same page and start asap I bring a wealth of skills and knowledge that make me the ideal candidate for your THTC+ project. My expertise in backend development and web development, particularly with technologies like Node.js, React.js, and Firebase aligns well with your needs for improving the backend architecture and building the web platform for trainers, gyms, and organizations. Plus, my proficiency in Stripe would also facilitate the smooth integration of your subscription/billing model. I've successfully developed and launched numerous platforms and apps over my career, many of which had similar functionalities to what you're seeking in THTC+. For instance, I’ve created e-commerce websites with billing portals, performance analytics dashboards, and user management systems. In addition to ensuring quality code refactoring and enhancing stability across platforms leveraging my expertise in Swift, Swift UI, CoreML, and AVFoundation for the iOS app. I'll ensure every aspect of this crucial project is addressed with utmost dedication. When you hire me for this project you are choosing not just technical skills but commitment towards meeting timelines, maint aining clear communication lines ,prompt bug fixing post deployment and accountable delivery throughout the development process. Let's make THTC+ the most efficient fitness app out there! Best regards
€3.000 EUR em 7 dias
3,7
3,7

Hi, -=-♠♠♠♠-=- I HAVE ALREADY DONE SIMILAR WORK IN PAST PLEASE OPEN THE CHAT WINDOW SO I CAN SHARE WITH YOU -=-♠♠♠♠-=- I have carefully read your complete description and I am genuinely interested in discussing everything in more detail. Your vision for a refined mobile app combined with a powerful web platform is clear and I am ready to help move it into a production ready phase with polished performance and reliable scalability. My background in mobile development, artificial intelligence integration, web platforms, and cloud architecture makes this a strong match. I have over seven years of hands on experience working with Swift, React, Firebase, Stripe, camera based features, and complex dashboards, allowing me to deliver a smooth workflow from the mobile side to the organizational platform. 1. Mobile refinement 2. Platform creation 3. Subscription setup 4. Data structuring 5. Interface upgrade I would enjoy collaborating on this and shaping a stable and scalable product together. Let us schedule a quick chat to align your vision and next steps. Best Regards, Prasham Jain
€3.000 EUR em 23 dias
3,7
3,7

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