App Overhaul: UI/UX, Payment and Web Development

@SBITServices

Hi, I will start by developing a fully functional, responsive website that mirrors the mobile app's features and seamlessly syncs with the backend database. Next, I will upgrade the payment gateway integration, automate fee calculations, and enhance the UI/UX design for a modern and intuitive experience. Additionally, I will implement dynamic city-based pricing and integrate WhatsApp with Supabase for efficient customer service. Let's discuss further. Regards, Sai Bhaskar

@starttechno

This project needs a coordinated overhaul rather than isolated UI changes: a responsive companion website, reliable payment and commission automation, city-based pricing, WhatsApp-to-Supabase workflows, and a security-focused bug audit. I’ll first map the existing app, database schema, authentication, and payment flow so the website mirrors the current features without duplicating business logic. I’ll build the web layer with PHP/HTML or the existing stack, using Supabase APIs and shared validation for consistent app and website behavior. Payment webhooks will be made idempotent, with clear transaction, fee, commission, and payout records, while city pricing will use a maintainable configuration model. I’ll also modernize the key screens for mobile responsiveness and simpler user journeys, then test edge cases such as failed payments, duplicate callbacks, incorrect city data, and unauthorized access. My experience includes ClearAgent, a live end-to-end operational SaaS, and DeskLeap with a public REST API, both requiring dependable workflows and integrations. Is the existing app already connected to Supabase, or should that connection setup be included? Muhammad Saad

@naminghn

Hi there, I'm ready to tackle the overhaul of your application with a responsive companion website that aligns perfectly with the existing features of your app. I can streamline the payment integration, automate fee calculations, and modernize the UI/UX for an enhanced user experience. Additionally, I can implement dynamic city-based pricing to cater to varying service costs. Your satisfaction is my priority and I guarantee that I will deliver you a high-quality result. Regards, Ali

@rbtech1984

Hello!! I understand you need an existing app and web platform overhauled with improved functionality, a smoother user experience, and reliable payment integration while keeping the existing system stable. * Is the current app built for Android, iOS, or both? * Which payment gateway and payment flows need to be implemented or improved? * Do you already have the existing source code and backend/API? The work can include UI/UX improvements, app and web feature development, backend/API updates, secure payment integration, authentication, database changes, bug fixing, responsive layouts, transaction handling, and end-to-end testing across the complete user journey. Relevant full-stack and mobile payment projects have been developed with secure transaction workflows and careful integration between frontend, backend, and third-party services. Let us chat and review the current application and payment flow so we can plan the overhaul efficiently. Best regards Farhin B

@shubhi8982

With over 5 years of experience as a Full-Stack Developer, I've not only honed my skills, but also built a strong understanding of the entire software development cycle. Your project aligns incredibly well with my core competencies, as I have a deep understanding and experience in web development, payment integration, UI/UX design, and security patches. My ability to build fully functional and responsive websites using HTML, CSS, JavaScript, React, Vue.js, Node.js and PHP will be valuable in synchronizing your companion website with the existing backend database and your mobile app. Moreover, I understand the importance of establishing city-based dynamic pricing in your app to automate commission calculations which makes me the right fit for this task. Additionally, given the non-negotiable budget for this project, my cost-effective approach and reliable work ethic ensures that I will not only deliver high-quality work but also do so within your financial guidelines. Let us bring your app to its next level together!

@denisSolution

Hi, I'm Denis, a full-stack developer who has worked on systems where payment flows, real-time data sync, and responsive UI need to align closely with mobile apps. The project makes sense: a companion website that mirrors the app’s logic, with dynamic pricing per city, automated fee distribution, and secure payment handling through Supabase and WhatsApp for support. Keeping everything synchronized with the existing backend while improving the UI and fixing bugs is the real challenge. I’d start by mapping the current data models and APIs to ensure the website fetches the right city-based prices and transactions without duplicating logic. Then I’d build a clean frontend that adapts to mobile and desktop, followed by payment gateway upgrades and fee automation. Supabase realtime and WhatsApp integration would come next, with a focus on error handling for failed transactions. Security audits and bug fixes would run in parallel to avoid regressions. One risk is unclear city pricing rules—if they’re not strictly defined, the logic could break under edge cases. We’d validate those upfront. Another is WhatsApp integration stability; rate limits can cause delays, so we’d need fallback queues. I can start working right away. Let's connect and discuss the details. Thanks, Denis.

@shayankhan333

Mirroring the app on web works best when the web client hits the same Supabase RLS policies the app already uses, otherwise city-based pricing and commission splits drift between the two. I'll build the responsive companion on your existing Supabase schema, rework the payment flow so fees, commissions and city pricing are computed server-side, and wire WhatsApp Cloud API into Supabase via webhooks. I can jump in right away. 1) Which gateway is live now, Stripe, Paystack or something regional? 2) Is the app Flutter or React Native? Happy to talk details in chat. Shayan

@muhammadsaad90

Hi, I can handle the complete platform upgrade within your fixed $250–$750 budget, including the companion website, payment and commission automation, modern UI/UX redesign, city-based pricing, WhatsApp–Supabase integration, and existing bug/security fixes. I’ll ensure the website stays synchronized with the current backend and application features, while keeping the system scalable and reliable for future improvements. Kindly Review My Profile: Main Portfolio: https://www.freelancer.com/u/muhammadsaad90 Best Regards, Muhammad Saad K

@mayr81

I can deliver the app overhaul end-to-end within the strict $250-$750 budget: a responsive companion website synced to the existing backend, upgraded payment gateway integration with automated fee/distribution logic, and a modern UI/UX refresh for a more intuitive experience. I will implement dynamic city-based pricing so service costs calculate automatically per city, connect WhatsApp directly to the Supabase backend for streamlined support, and perform a focused audit to fix current bugs and patch security vulnerabilities. Expect clean, maintainable implementation aligned to your current architecture and features, with thorough testing to ensure the website and mobile app stay consistent.

@emilesd617

Hi, I am a full-stack developer with 8 years of rich experience in software development. I am familiar with PHP, HTML, JavaScript, Supabase, Payment Gateway Integration, Database Management, Web Development, UI/UX Design, and API Integration. I can revamp the existing app UI, build a responsive companion website connected to the same backend, and upgrade the payment flow with automated fee and commission calculations. I can also implement city-based pricing, connect WhatsApp with Supabase, fix existing bugs, and review the application for security issues while keeping the work within your stated budget range. I'm an individual freelancer and can work on any time zone you want. Please contact me with the best time for you to have a quick chat. Looking forward to discussing more details. Thanks. Emile.

@ianb65

Hi there, Your payment flow, UI, and companion website need a coordinated rebuild, not isolated fixes. I have strong expertise in solving exactly this type of problem. I’ll audit the current HTML structure, redesign the interface for clarity and conversion, integrate payment processing with fee automation, and build a responsive companion site that syncs cleanly with your backend. I’ll also implement the city-based pricing logic, tighten security, and fix bugs so the whole platform feels consistent and reliable. Best regards, Ian

@umer419

Hello, I checked your project "App Overhaul: UI/UX, Payment and Web Development" and already have a clear understanding of your requirements and how to deliver them efficiently. I have solid experience in PHP, Website Design, HTML, Web Development, and I've successfully completed similar projects by delivering high-quality, scalable, and reliable solutions. Why choose me? * Strong expertise in PHP, Website Design, HTML, Web Development * Clean, optimized, and scalable implementation * Fast communication and regular progress updates * Focused on delivering results, not just completing the task I'm ready to start immediately and would be happy to discuss the details. Best regards, Umer

@ShahidSolutions

I can create your companion website with app synchronization, payment/commission automation, city-based pricing, WhatsApp-Supabase integration, UI redesign, bug fixes and security. Ready to start immediately. we can discuss more detail in chat.

@CodeAnchors

Greetings, I understand the critical need to enhance the UI/UX, payment systems, and web development for your application. My expertise in PHP, Website Design, Graphic Design, and HTML equips me to tackle these challenges effectively in the Saudi Arabian market. To ensure project success, I propose a structured approach involving thorough requirement confirmation, controlled planning, clean implementation, rigorous testing, and transparent milestone checkpoints. This method guarantees a reliable execution leading to long-term results. With a proven track record in delivering high-quality projects, my portfolio showcases successful ventures in PHP, Website Design, and Web Development. Could you share more about your top priority or core business goal for this project? Let's discuss further in an open chat to finalize the scope seamlessly. Best regards, Muhammad Anas Khan

@ayesha86664

Hi there! I understand this project needs several connected changes, especially the payment automation, full UI redesign, and a responsive website that works with the existing mobile app backend. The main challenge is making these changes without breaking current features, payments, or database synchronization. I have experience with PHP, HTML, responsive web development, database management, payment integrations, Supabase, UI improvements, and bug fixing. I can work within your strict $250 to $750 budget and focus on delivering the required features efficiently. I will first review the existing application and backend structure, then build the companion website around the current functionality. I will improve the UI, implement city-based pricing, update payment and commission calculations, and connect WhatsApp with Supabase. I will also test existing workflows, fix bugs, and review common security issues before delivery. check our work https://www.freelancer.com/u/ayesha86664 Could you share the current app, backend details, and payment gateway being used? Let me know if you’re interested & we can discuss it. Best Regards Ayesha

@adityakhuman006

Drawing on years of experience and a passion for creating impactful applications, my HTML and PHP proficiency, along with my expertise in API integrations, makes me the ideal freelancer for your app overhaul project. The project demands juggling multiple facets such as web development, payment integration, UI/UX redesigns, dynamic pricing, and security patching & bug fixing. My extensive knowledge of these areas enables me to deliver the comprehensive solutions you seek. Not only can I build responsive websites that embody your vision and synchronize seamlessly with your app's backend database, but I can also revamp your payment gateway to automate complex fee calculations. For the modern user experience you're aiming for, I have a knack for crafting clean, beautiful interfaces that are both intuitive and visually appealing.

@sara0346

Hello, I reviewed your project about improving an existing platform with UI redesign, payment upgrades, and a companion website. I will modernize the interface, build a synchronized web experience, enhance payment and commission logic, integrate Supabase with WhatsApp, and fix technical issues. The final result will be a secure, scalable platform with a smoother user experience. I would be happy to discuss the implementation. Best Regards Sara

@novatech2210

Hello, I’m excited to help you revamp your app, modernize the UI/UX, upgrade payments, and build a responsive companion website. With extensive experience in mobile‑to‑web synchronization, Supabase integration, and secure payment gateways, I’ll deliver a polished, city‑based pricing system, seamless WhatsApp support, and robust bug fixes—all within your $250‑$750 budget. I’m fully committed to completing the project on time and will keep you updated throughout the development process. Looking forward to collaborating and turning your vision into reality.

@Aaleen110

The core of this job is making the existing app and its backend talk to a new website, also updating how money moves around. I'd start with the payment system, that’s the most critical piece for cash flow, getting the new gateway set up and fee automation logic working before touching anything visual so the money flows correctly. Then I'd build the companion website, mirroring the app's features using PHP for the backend and making it fully responsive for all devices, ensuring it syncs with the database. The UI/UX redesign would come last, building on the functional base. I am a Preferred Freelancer on Freelancer with a 5.0 rating, 100% on time and 100% on budget. What specific payment gateway are you currently using that needs upgrading? Let's schedule a short call on Freelancer to cover the exact payment gateway and the website feature parity.