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I’m building an Android-only application that lets customers book our home-service offerings in three quick steps: pick a service, choose an available time slot, and secure it with a PayPal deposit. I’ll supply the detailed business rules that govern which technicians are available when, along with all exception logic. The core build needs to cover: • Real-time slot calculation based on the rules I provide • Secure PayPal deposit collection and confirmation • Two-way calendar sync (Google Calendar preferred) so my team’s schedules update automatically • Push and/or SMS reminders for both customers and staff • A straightforward cancellation flow that triggers our refund policy logic • A lightweight dashboard where the team can view, edit, or cancel today’s bookings at a glance Clean, intuitive UI and reliable notifications matter more to me than fancy visuals. If you plan to use Kotlin with Firebase or another backend stack that keeps future maintenance simple, let me know—though I’m open to alternatives. As long as the finished APK, source code, and a brief hand-off guide arrive thoroughly tested and ready for the Play Store, we’ll be in great shape.
Project ID: 40695395
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185 freelancers are bidding on average $475 USD for this job

Hello, I am Dr. Rajesh Rolen, PhD in Computer Science & Engineering, with experience of over 20+ years in Android, Android App Development, Kotlin, Mobile App Development, UI / User Interface, User Interface / IA, Software Architecture As a preferred freelancer in the top 1%, I have done 400+ projects here on freelancer.com, I have 4.9 ratings out of 5 on average, which showcases my quality of work and timely delivery. Key Highlights: - Free Hosting Support on the Cloud or any desired platform. - Free 3 months of post-delivery support to ensure that our client doesn’t face any challenges after the launch of the project. - Free Dedicated tester on projects to ensure quality delivery, so clients don’t need to act as a tester. - 10+ Years experience UI/UX team to ensure intuitive UI. Portfolio: https://www.freelancer.com/u/Microlent Please open the chat and send me a message, so we can have a more detailed discussion about the project to give you the project timeline and cost. Thank you for considering my services. I look forward to engaging in a productive conversation and understanding how I can be of assistance in bringing your project to life. Regards Rajesh Rolen
$500 USD in 10 days
9.5
9.5

Hello, Android Home-Service Booking App {{{ I HAVE CREATED SIMILAR BEFORE AND I CAN SHOW YOU }}} I have carefully reviewed your requirements and understand that you need a simple and reliable Android booking app where customers can select a service, choose an available time slot and secure the booking with a PayPal deposit. I have 11+ years of Android and full-stack development experience and can build the application in Kotlin with a maintainable backend, implementing your technician availability rules and exception logic for accurate real-time slot calculation. I will integrate secure PayPal deposit payments, Google Calendar two-way synchronization, and push/SMS reminders for customers and staff. The cancellation flow will also connect with your refund rules so booking and payment status remain synchronized. I will provide a lightweight team dashboard for viewing, editing and cancelling today's bookings, with a clean non-technical UI focused on speed and usability rather than unnecessary visuals. I will thoroughly test the booking, availability, payment, calendar sync, notifications and cancellation flows, then deliver the production-ready APK, complete source code and hand-off documentation ready for Play Store submission. I WILL ALSO PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. I eagerly await your positive response. Thanks, Christina
$300 USD in 3 days
8.5
8.5

Hello We are Ominfowave Software Services Pvt. Ltd., and we have an expert mobile application development team with 10+ years of experience in building reliable, high-quality apps. ? Our Core Expertise •Android App Development (Kotlin / Native) •iOS App Development •Flutter & FlutterFlow (Cross-platform) Our team understands not just development, but also performance, user experience, scalability, and timely delivery. ? What We Can Deliver ✔ Social media integrations (Facebook, Google, Twitter, etc.) ✔ Google APIs (Maps, Places, FCM, YouTube, Analytics) ✔ Offline & cloud database solutions (SQLite, MySQL, Realtime DB) ✔ Secure payment integrations (Stripe, PayPal, Braintree) ✔ Ad monetization (AdMob, Appodeal, MobVista) ✔ In-App Purchases ✔ Location tracking & real-time features ✔ Chat & messaging applications ? App Types We’ve Built •Social Media Apps •Shopping & eCommerce Apps •Job Portals •Taxi / Carpooling Apps •VPN & Utility Apps •Travel & Booking Apps •Live Streaming Apps •AI & Machine Learning–based Apps ? Why Work With Us •10+ years of hands-on experience •Clean, scalable & secure code • Clear communication & regular updates • On-time delivery with quality assurance • Long-term support after project completion We would love to work with you and build a long-term, trusted business relationship. Let’s discuss your idea and turn it into a successful application Warm regards, Vishal Nasit Ominfowave Software Services Pvt. Ltd.
$350 USD in 20 days
8.4
8.4

You need an Android-only app that lets customers book home services in three quick steps: pick a service, choose an available time slot (calculated in real time from the business rules you supply), and secure it with a PayPal deposit. The app must also handle two-way calendar sync (Google Calendar preferred), push/SMS reminders, a cancellation flow that triggers your refund policy logic, and a lightweight dashboard for staff to view/edit/cancel today’s bookings. A clean, intuitive UI and reliable notifications matter more than fancy visuals. You’ll provide the detailed availability and exception rules; the deliverables must include APK, source code, and a brief hand-off guide, thoroughly tested and Play Store–ready. Proposed scope - Real-time slot calculation engine wired to the business rules you provide, with conflict checks and exception handling. - Secure PayPal deposit collection and confirmation flow integrated into booking. - Two-way Google Calendar sync for technicians’ schedules and automatic updates. - Push and/or SMS reminders plus a simple cancellation/refund-trigger flow. - Lightweight staff dashboard to view, edit, cancel today’s bookings; final delivery includes APK, source, and hand-off notes. Questions 1) Do you prefer Firebase or another backend stack for authentication, booking storage, and push messaging? 2) Do you already have PayPal business credentials and Google Workspace/calendar access for technicians? Best regards, Sanket
$500 USD in 17 days
7.4
7.4

Hello, Your Android home-service booking app is a strong fit for a focused, maintainable build. I can develop the three-step booking flow, rule-based real-time availability, PayPal deposits, cancellation and refund logic, Google Calendar synchronization, reminders, and the team booking dashboard. Kotlin with Firebase would provide a practical foundation for authentication, notifications, scalable data handling, and simpler future maintenance. I would also recommend adding an audit trail for booking, payment, cancellation, and schedule changes so staff can quickly resolve customer issues. The final delivery can include the tested APK, complete source code, Play Store preparation, and a concise hand-off guide. Check our portfolio, https://www.freelancer.com/u/installerpoint Best Regards, Muhammad Adeel
$250 USD in 5 days
7.0
7.0

Hello, I am very interested in your project for building an Android home-service booking app. I have a strong background in UI/UX design, mobile app development, and Android app development, with expertise in Kotlin and software architecture. I understand the project requirements for real-time slot calculation, secure PayPal deposits, calendar sync, reminders, cancellation flow, and a dashboard for managing bookings. I plan to create a clean and intuitive UI design with reliable notifications, focusing on functionality and user experience. I will use Kotlin and Firebase to ensure a seamless backend stack for easy maintenance. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I would love to discuss the project further and explore how we can work together to bring your vision to life. Best regards, Warda Haider
$250 USD in 4 days
7.0
7.0

✅Home-Service Booking App| React Native | Firebase |Mobile App Development Expert Hi, Hope you are doing good. I have read your requirements carefully and can give you 100% assistance as a React Native Developer for building or enhancing your mobile application. I specialize in creating fast, stable, and scalable apps for both iOS & Android, backed by a secure and efficient Firebase architecture. I’d love the opportunity to discuss your idea further and collaborate on developing a modern, intuitive, and impactful app. (Note: Please consider the current budget as flexible — we can finalize it after discussing the complete scope.) Thanks & Regards, Kajal
$750 USD in 7 days
7.0
7.0

I can build your Android booking app with a strong focus on speed, reliability, and simple day-to-day maintenance. I recommend React Native for the mobile app, giving you a clean, native-feeling Android experience while keeping the codebase efficient and scalable for future expansion. The booking flow will stay intentionally simple: select service → choose a real-time available slot → pay the required PayPal deposit. I’ll implement your technician availability rules, exceptions, buffers, working hours, and booking conflicts into a reliable slot-calculation engine so customers only see genuinely bookable times. For the backend, I can use Firebase for a lightweight, low-maintenance architecture, or Laravel + MySQL if your business rules require a more structured/custom backend. I’ll integrate secure PayPal payment confirmation, Google Calendar two-way synchronization, and push/SMS reminders for both customers and technicians. A practical team dashboard will provide a quick view of today’s bookings with options to edit, cancel, and manage appointments. Cancellation will connect directly to your refund-policy logic. You’ll receive the tested APK, complete source code, backend, configuration/documentation, and a concise hand-off guide, with testing focused on booking conflicts, payments, calendar synchronization, cancellations, notifications, and edge cases so the application is ready for Play Store submission. Regards, Asad
$500 USD in 7 days
6.7
6.7

★★★ Kotlin SPECIALIST ★★★ Hi, To ensure real-time slot calculation based on the business rules you provide, I will implement a robust backend that efficiently manages technician availability. This approach prevents scheduling conflicts and ensures that customers can book services without delays. I will integrate secure PayPal deposit collection, ensuring that transactions are processed smoothly and confirmations are sent promptly. This will enhance customer trust and streamline the booking process. For the two-way calendar sync, I will configure Google Calendar integration to automatically update your team's schedules, minimizing manual entry and errors. Additionally, I will set up push and SMS reminders to keep both customers and staff informed about upcoming appointments, which will reduce no-shows. I'll create a straightforward cancellation flow that adheres to your refund policy, ensuring compliance and customer satisfaction. The lightweight dashboard will allow your team to manage bookings efficiently, providing a clear overview of daily appointments. I'll deliver a thoroughly tested APK, source code, and a brief hand-off guide to ensure a smooth transition to your team. To get started, I will need the detailed business rules and any specific design preferences you have in mind. Thanks!
$300 USD in 10 days
7.1
7.1

Hi,I’ve already developed similar home-service and appointment booking solutions, including service selection, real-time availability, scheduling, online payments, notifications, and booking management. So I understand the practical challenges behind this project, especially slot availability and exception-based scheduling. I can build your Android application with a clean, simple UI focused on making booking fast and reliable: • 3-step service → time slot → PayPal deposit flow • Real-time slot calculation based on your technician/business rules • Secure PayPal payment and confirmation • Google Calendar two-way synchronization • Push/SMS booking and reminder notifications • Cancellation and automated refund-policy handling • Team dashboard for viewing, editing and cancelling bookings • Secure backend, authentication and reliable data synchronization • Fully tested APK, source code and hand-off documentation I can use Kotlin + Firebase where appropriate, while keeping the architecture flexible for future enhancements and integrations. Since I have already worked on similar systems, I can quickly understand your existing business rules and convert them into a reliable booking workflow without unnecessary complexity. I’d be happy to share examples of my previous booking/service applications and discuss the implementation plan. Let’s build a stable, Play Store-ready solution.
$500 USD in 7 days
7.7
7.7

Hi, It will be an honor for me to work with you. I have got 12 years of android application development experience (Kotlin, Java, Jetpack Compose). Lets discuss this in detail and get this started. I will take care of Firebase as well. Looking forward to hear from you.
$550 USD in 10 days
6.9
6.9

Hello, I understand that you are looking to develop an Android home-service booking app that allows customers to book services quickly and securely. I will ensure real-time slot calculation, secure PayPal deposits, calendar sync, reminders, and a user-friendly cancellation process. My expertise in Mobile App Development, Android, UI/UX design, and Kotlin will guarantee a seamless and efficient app. Effective communication and collaboration throughout the project are my top priorities to ensure your vision is realized. Please find examples of my previous work in my portfolio: https://www.freelancer.com/u/Curveballsol Best regards, Curveball Solutions
$250 USD in 2 days
6.4
6.4

Hello there, Hope you are doing well I can build your Android home-service booking application with a clean, intuitive booking flow focused on reliability rather than unnecessary visual complexity. I understand the core journey: select service → choose an available time slot → pay PayPal deposit → receive confirmation, with availability driven entirely by your business rules and exception logic. Key Features Native Android application using Kotlin + Jetpack Compose Real-time slot calculation based on your technician availability rules Secure PayPal deposit integration with server-side payment confirmation Google Calendar two-way synchronization for team schedules Customer and staff push/SMS reminders Booking confirmation, rescheduling and cancellation workflows Configurable refund/forfeit logic based on your cancellation policy Lightweight staff dashboard for today's bookings Edit/cancel booking functionality Booking history and status tracking Reliable handling of network interruptions and payment callbacks Secure authentication and role-based access Recommended Tech Stack Android: Kotlin + Jetpack Compose Architecture: MVVM / Clean Architecture Backend: Node.js + NestJS Database: PostgreSQL Thanks & Regards Dheeraj K.
$250 USD in 7 days
7.0
7.0

Hello, I hope you're doing well. I have a clear understanding of your project requirements for developing an Android Home-Service Booking App. The focus is on streamlining the booking process for customers through a secure PayPal deposit system and real-time slot calculation based on specific business rules. My approach involves structured requirement confirmation, controlled planning, clean implementation, thorough testing, and milestone-based transparency to ensure a successful outcome. With a strong background in Mobile App Development, UI/UX design, and Android App Development, I am confident in delivering a reliable solution that aligns with your business objectives. You can view examples of my previous work in my portfolio: ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐ To better assist you, could you please share your top priority or primary business goal for this project? Let's discuss further details in an open chat to finalize the scope seamlessly. Best regards, Muhammad Anas Khan
$250 USD in 4 days
5.8
5.8

Hello dear, Greetings from Md. Toriqul Islam! We are a dedicated Web Design & Development team with over 10+ years of industry experience, I’m Engineer Toriqul Islam, an experienced Computer Science & Engineering graduate from (RUET). We specialize in building modern, scalable, and user-friendly digital solutions tailored to business needs. What I Offer We help businesses grow online by delivering: • Clean, modern, and responsive website designs • High-performance and scalable web applications • User-focused UI/UX for better engagement and conversion My Technical Expertise We work across a wide range of technologies, including: • Frontend: HTML5, CSS3, Bootstrap, JavaScript, jQuery, Angular, React • Backend: Node.js, PHP, Laravel, .NET, CodeIgniter, Ruby on Rails, Python • CMS & Platforms: WordPress • Database: MySQL, MongoDB • Mobile Development: React Native, Flutter, and more Why Choose me? ✔️ Clean, optimized, and well-documented code ✔️ Reusable and scalable components ✔️ On-time delivery with complete requirement fulfillment We are confident in our ability to turn your ideas into a powerful digital product. Let’s discuss your project and make it a success. Looking forward to working with you! Best Regards, Md. Toriqul Islam
$250 USD in 4 days
6.0
6.0

With over a decade in the mobile app development field, I've acquired extensive experience in building and scaling app platforms that deliver substantial results, solve real problems, and optimize workflows—exactly what your home-service booking app needs. Utilizing my skills in Android App Development and User Interface / IA, I guarantee an interface that is clean, intuitive, and responsive, allowing your customers to book effortlessly and your team to manage their schedules effectively. Additionally, as an experienced full-stack developer familiar with multiple languages and frameworks such as Kotlin with Firebase, I'm adept at working with efficient backend stacks that align with my clients' preferences- a vital attribute for successful collaboration. Furthermore, my previous works on apps like SaaS solutions and high-performance CMS platforms are testament to my ability to deliver on-time maintenance-friendly code regardless of complexity. Lastly but not least, I'm renowned for delivering secure and scalable projects that outperform expectations - a necessary attribute when it comes to handling mission-critical systems like yours. Partnering with me doesn't just provide you an app, it provides longevity through long term support and growth opportunities as well. So let's go beyond your expectations together!
$500 USD in 7 days
5.9
5.9

Hello Client, Greeting of the day!!!! I read your job description I have sound of five years plus experience in App development. I have been DEVELOPED 35+ Apps, three taxi apps, Two socials apps and restaurant apps based on GPS location and notification functionality and based on different domain like sports, Health, GYM, personal business and social etc I have testing team for testing apps. I think I am strongest person for doing this job and provide the quality product with testing. I am always available for your support. Thanks Sr. Mobile Developer
$250 USD in 20 days
6.7
6.7

Greetings, At Bhanguz Software Solutions (19+ years in IT), our Android engineering team specializes in scheduling engines, two-way calendar sync, and payment gateway implementations. We can build your 3-step home-service booking app with robust backend logic and automated reminders. Technical Strategy & Architecture Mobile App: Kotlin built with modern MVVM architecture, Jetpack components, and a clean 3-step UI for effortless booking. Backend Logic & Slot Engine: Firebase (Cloud Functions, Firestore, Cloud Messaging) to execute real-time slot availability algorithms, buffer times, and technician assignment rules. Google Calendar 2-Way Sync: Bi-directional API integration ensuring technician schedule updates reflect instantly across both the app and Google Calendar. PayPal Deposit & Cancellation: Tokenized PayPal SDK integration for secure deposit collection, coupled with an automated refund trigger policy for canceled bookings. Staff Dashboard & Reminders: Lightweight web/mobile admin view for real-time schedule management, paired with FCM push and Twilio SMS notifications for customers and staff. Project Terms & Turnaround Fixed Investment: $1,200 – $2,000 USD Estimated Timeline: 2 – 3 Weeks Deliverables: Production-ready APK/AAB, clean Kotlin source code, Firebase setup, full ownership, and step-by-step hand-off documentation. Let's connect on chat to review your technician availability rules and start building! Warm regards, Bivanshi
$650 USD in 20 days
5.6
5.6

Hi, Aleksandar here, from Serbia, to help you. Real-time slot calculation only stays accurate if it checks against Google Calendar live at booking time, not a cached schedule that can drift out of sync with last-minute changes on the team's side. I noticed you want two-way Google Calendar sync alongside real-time slot availability - that usually means the booking flow needs to query the calendar directly before confirming a slot, not just after, so a technician's last-minute change doesn't create a double-booking, so I'd design that check into the core booking logic from the start. I'd build this in Kotlin with Firebase as the backend, real-time slot calculation against your business rules, PayPal deposit collection, two-way Google Calendar sync, push and SMS reminders, a cancellation flow tied to your refund logic, and a simple team dashboard for managing today's bookings. Could you share the detailed business rules and exception logic for technician availability so I can scope the slot calculation accurately before finalizing the milestone plan? Looking forward to working with you.
$350 USD in 9 days
5.6
5.6

Hi, I read your requirements and can build your Android home service booking app using React Native, with a clean and scalable architecture. I’ll implement real-time availability and slot calculation, secure PayPal deposits, Google Calendar sync, push/SMS reminders, cancellation and refund logic, and a lightweight booking dashboard for your team. With 4+ years of experience in React Native development, I focus on high-performance, production ready apps with clean code and intuitive UI/UX. I’ll thoroughly test the complete booking and payment flow and provide the Play Store-ready build, source code, and hand-off documentation. Please share your business rules and booking workflow so I can review the scope and get started. Best Regards, Hassan
$500 USD in 7 days
5.5
5.5

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