Android talkback apk jobs

I am seeking a talented mobile app developer to create an Android application for employee attendance tracking. The app will utilize map-based authentication to ensure employees are checking in from the correct location. Key Features: - Employee Attendance Tracking: The primary function of the app will be to track employee attendance. - Map Authentication: The app should incorporate map-based authentication to verify employees' locations during check-in. Ideal Skills and Experience: - Proficient in Android app development. - Experience with implementing location-based services in mobile applications. - Knowledge in developing user-friendly and efficient mobile applications.

I'm seeking an experienced mobile app developer to create an Android application for tracking employee attendance. The app will utilize map authentication to ensure employees are on-site when clocking in. Key features and requirements: - Design and develop an intuitive, user-friendly interface - Implement map-based authentication to verify employee locations - Ensure the app is compatible with a wide range of Android devices - Prior experience with Android app development is a must - Knowledge of implementing geolocation features is highly desirable - A portfolio of similar productivity tool applications will be viewed favourably The ideal freelancer for this project will not only have a strong technical background, but also an understanding of the requirements ...

I'm looking for a seasoned developer or a team that can create a comprehensive e-commerce marketplace similar to the Markaz :// This platform must include a mobile application compatible with both iOS and Android, with specific user roles and functionality. Key Features Required: - User Authentication and Profiles: Each user, whether a customer, salesperson, or administrator, will need a unique profile. The app should have a seamless sign-up process, including a bonus for new registrations. - Product Listings and Search: The marketplace should enable product listings and an intuitive search functionality to enhance user experience. - Incentive Calculations for Salesperson: The app needs to incorporate a system to calculate incentives for salespersons based on their

I need a lightweight, cross-platform application for managing shuttle bookings and car rentals. The app should be developed for iOS, Android, and Windows. Key Features: - Shuttle bookings: Users should be able to view and book shuttle services. - Car rentals: Users should also have the option to rent cars via the app. - Lightweight: The app should be efficient and not consume excessive system resources. The ideal candidate for this project should have experience in cross-platform app development and be familiar with implementing booking systems in an app. A portfolio showcasing similar projects would be an advantage. As for the payment feature, I am currently unsure if it should be included. However, the app should be designed in a way that allows for easy integration o...

...microcontroller for an exciting project. The microcontroller will be responsible for integrating various modules and communicating with an Android application. Key Responsibilities: - Coding the microcontroller to process sensor data, control motors, and implement communication protocols - Ensuring seamless integration of a variety of modules including sensors, actuators, and wireless communication modules, as well as GSM and GPS - Utilizing a proximity sensor within the microcontroller's tasks Ideal Skills and Experience: - Extensive knowledge and experience in microcontroller programming - Proficiency in integrating and coding for various modules - Prior experience in Android communication protocol implementation - Familiarity with GSM and GPS integration - Expe...

Android & iOS App for Location Tagging.

...operational and functional, ready-made multi-vendor e-commerce platform, complete with iOS and Android apps. The ideal platform will: - Deduct a commission on each product sold - Charge a fee for each product added - Allow merchants to specify whether the product is new or used I am looking for a serious individual who can provide a platform that may need only minor adjustments. Please note, I do not require a new design as I am seeking a ready-made multi-vendor store. The ideal freelancer for this project should have: - Experience with e-commerce platform development - Understanding of multi-vendor system requirements - Ability to make minor adjustments to a ready-made platform - Knowledge of iOS and Android app integration Please only respond if you have a ready-m...

I need a simple app for Android. The app should display who currently has a meeting room booked and what the meeting topic and time is.

...allow independent development, testing, and deployment of features. Core Components: Web-based MIS: Backend: Handle APIs, database queries, and business logic. Frontend: Provide an intuitive interface for data entry, monitoring, and reporting. GIS Module: Geospatial data visualization. Integration of PostGIS for spatial queries. Mobile App: Offline data collection with synchronization. Support for Android and iOS. Dashboard: Real-time analytics and visualizations using libraries like D3.js or Chart.js. Interoperability Layer: Enable integration with external systems Data Storage: PostgreSQL for structured data. PostGIS extension for spatial data. Hosting: Cloud-based for scalability (AWS, Azure, or GCP). Use Docker containers for easy deployment and environment consistency. 2. Da...

I'm in need of a skilled developer or...ID. - A selfie capture feature. - Authentication: Users will sign up using their phone numbers and authenticate via a password. - Unique Payment Platform: Money transfer will be conducted through our proprietary platform, not through common services. Platforms: The app should be compatible with both iOS and Android. Timeline: I am looking to have this completed within a 2-week timeframe. Ideal Skills and Experience: - Proficiency in mobile app development for iOS and Android. - Experience with implementing eKYC processes in an app. - Prior work on creating a money transfer app is a big plus. - Strong understanding of secure authentication methods. - Ability to work within a tight deadline. Specific documentation will be pr...

I'm looking to create a mobile app for both iOS and Android that assists users in calculating the cost and appropriate selling price for import/export items. This app is based on a long-standing Excel file I've used for these calculations. Key Features: - Cost Calculation: Users should be able to accurately estimate the total cost of items. - Selling Price Calculation: The app should help users set the right selling price for their items. - Comprehensive Expense Assessment: The app needs to factor in currency exchange rates, and sea freight costs. Ideal Skills: - Cross-platform mobile app development (preferably using React Native or Flutter) - Proficiency in Excel and understanding of its complex formulas - Strong background in cost analysis and pricing strategy for imp...

...OEMs, insurance companies, and warranty providers for seamless claims. Certified service providers and local mechanics. Regular customer reviews and feedback systems. Customer Rewards and Engagement: A reward system for customers, service providers, and the platform. Transparent pricing and customized solutions. Technological Integration: Website launch with a small customer base, followed by Android and iOS apps. Plans to explore advanced technologies like 3D vehicle modeling, IoT, and possibly quantum computing for future scalability. Unique Selling Proposition (USP): Fast, reliable, and transparent automobile services delivered at the customer’s doorstep. A one-stop solution for both routine maintenance and emergency assistance. Focus on creating a rewarding ecosystem ...

I'm looking for a skilled full-stac...sharing - Integration of a subscription and billing system (Stripe) - An analytics dashboard showcasing usage stats The primary goal of this application is to enhance collaboration within teams. Therefore, previous experience with building collaborative tools will be a significant plus. Please note that the development of this application does not need to support specific platforms such as iOS or Android at this stage; a web-based application will suffice for the initial launch. Ideal candidates for this project will be proficient in the MERN stack and have a strong understanding of building SaaS applications. Experience with implementing role-based access, integrating payment systems, and developing analytics dashboards will also be grea...

I'm seeking a proficient developer to create a module for my Android POS system built with React Native that connects with the Beko X30 TR Terminal. The aim is to streamline payment processing and print receipts complying with the Turkish Finance law. Key Requirements: - Development of a module for Mobile POS that connects with Beko X30 TR Terminal via WIFI - The module must allow to transmit oder details to the terminal (entered through our touchscreen pos). - The module should streamline the operations properly. Ideal Skills: - Expertise in POS systems, particularly Mobile POS - Experience with Beko X30 TR Terminal - Proficiency in developing payment processing modules - Knowledge of integrating various payment methods

Job Title: UI/UX Designer for Telehealth Mobile Application Job Description: We are looking for an experienced freelance UI/UX Designer to redesign and update the user interface of our existing telehealth mobile application, developed in Flutter, to align with the latest design trends. The app supports both iOS and Android platforms. The project will involve designing at least 15-20 screens Requirements: • Proven experience in designing UI/UX for telemedicine or healthcare applications. • Familiarity with modern UI/UX trends and best practices. • Ability to provide references and examples of previous work in the telehealth domain. • Experience working with Flutter-based applications is a plus. • Excellent communication skills and the ability to collaborate...

I am seeking a professional who can assist in publishing my new Android app on the Google Play Store. The .apk file is ready and I already have a Google Play Developer account set up. The primary task is to help with the app listing. The ideal freelancer for this project should have: - Proven experience with publishing apps on the Play Store. - Strong skills in app listing creation, including writing a compelling app description, creating engaging graphics and screenshots, and setting up relevant keywords and metadata. - Knowledge of Play Store best practices to optimize the app's visibility and downloads. I am looking for a freelancer who can ensure a smooth and successful app launch. Please provide examples of apps you've published in the past.

I'm looking for a skilled app developer to create a dual iOS and Android application that enables clients to connect with our technical support team via video link. Main functionality is to provide technical online support to yacht owners through our team of mechanics. The app should have the following features: - **Video Link**: Clients should be able to connect with our expert team through a stable and high-quality video link. - **Screen Sharing**: The app should allow our experts to view the client's screen and guide them through the troubleshooting process. - **Recording**: All sessions should be recordable for future reference and training purposes. - **Chat Functionality**: A built-in chat function for text communication during the video call. - File Sharing: All...

I'm seeking an experienced mobile app developer, specifically for Android, to create a social networking application. Ideal Skills: - Proficiency in Android app development - Prior experience with social networking apps - Strong UX/UI design skills - Knowledge of integrating social features (chat, sharing, etc) The project will require a deep understanding of: - Interactive design - User engagement strategies - Scalable architecture Please provide examples of relevant past work with your bid. Your ability to deliver a high-quality, engaging and functional app will be crucial for the success of this project.

I'm looking for a skilled PHP developer with Android expertise who can integrate a specific formula for calculating pathology test result value based on another test value into my existing custom-built system. This project involves both a PHP portal and an Android mobile app. Key Requirements: - PHP development for the portal - Android app development - Integration with a custom-built system - Understanding of mobile app development principles - Experience with backend system integration

I need an experienced professional to root my Motorola Edge 30 Pro. The phone is currently running Android 14. I'm looking to root my phone to gain administrative control. This will allow me to have more flexibility and customization options. Ideal Skills: - Extensive experience with rooting Android devices, specifically Motorola models. - Proficiency in dealing with Android 14. - Strong understanding of administrative control implications post-rooting. - Ability to provide guidance on post-rooting options.

...accessibility and make recommendations for improvement. 4. Accessibility Audit: Need both Manual and Automated Audit. The following types of testing will be carried out on each unique template page: - Screen reader testing using Jaws for Windows/Chrome - Screen reader testing using NVDA for Windows/Firefox - Screen reader testing using Voiceover for MacOS/iOS - Screen reader testing using Talkback for Android - Browser Zoom testing - High Contrast testing - Keyboard-only testing - Color Contrast testing - Automated tool (Wave by WebAIM or AXE by Deque) 5. Accessibility Remediation: Begin implementing the remediation plan by fixing the identified accessibility issues. This may involve modifying code, adjusting layout and design elements, adding alternative text to images...

...Doctor Finder App from CodeCanyon, with the source code readily available. However, I'm encountering challenges in building and compiling the project. I'm seeking a proficient freelancer who can: - Successfully build the app from the provided Android source code. - Ensure the app is functional, free of bugs, and ready for deployment. - Execute minor design tweaks as necessary. - Provide a walkthrough or concise documentation on how to build it in the future if needed. Ideal candidates for this project should have: - Extensive experience with Android app development and deployment. - Proficiency in making minor design adjustments. - Excellent communication skills for providing clear, understandable documentation. I would appreciate insights on the expected tim...

I'm looking for a talented mobile developer to build a cross-platform (iOS & Android) marketplace app based on the Figma design our designer will provide. The app should include the following core features: - User Profiles: 2 types of users. Users should be able to create and manage their own profiles. This includes options for customization, viewing their purchase history, and managing their listings. - Payment Gateway Integration: The app needs to be capable of handling transactions securely and efficiently. Experience with integrating reliable payment gateways is a must. - Product Listings: Users should be able to list their products easily. The app should have an intuitive interface for creating listings, complete with images, descriptions, and pricing. Ideal ca...

I'm in need of a skilled Android developer to create a native Android library for me.

I'm seeking a proficient mobile app developer to create a cross-platform application for both iOS and Android. The app should facilitate self-registration for service providers and allow service takers to select service duration based on a rate card. Key Features: - Cross-platform compatibility - Self-registration for service providers - Service taker interface with a rate card - Social Media Login, specifically Google Ideal Skills and Experience: - Extensive experience in mobile app development, especially cross-platform - Proven track record of creating service-oriented applications - Proficiency in integrating Google for Social Media Login - Ability to design user-friendly interfaces for both service providers and service takers

I need a skilled Flutter developer to convert my website into a mobile app for both iOS and Android platforms. Key requirements: -integrating push notifications and app permissions. Skills and experience: - Proficient in Flutter with a strong portfolio of mobile apps created with it. - Experience in converting websites to mobile apps.

...referral program and an AI Trading Module to enhance user engagement and investment features. Here are some additional functionalities and considerations that could enhance the platform and should be discussed with the freelancer: ### **Additional Functionalities:** 1. **iOS App Development**: - If your target audience includes iOS users, you may want to develop an iOS app alongside the Android app for broader platform coverage. 2. **User Roles and Permissions**: - Define roles (e.g., admin, sub-admin, trader) and set granular permissions for each role. 3. **Audit Logs**: - Include detailed logging of all user and admin actions for better traceability and compliance. 4. **User Verification Levels**: - Allow for tiered access based on KYC verification levels, e...

good morning, I have an android webapp and set up push notifications with firebase and everything works perfectly, I duplicated this webapp, changed the package name with android studio, uploaded but I don't get push notifications....

I need a professional to integrate Firebase Cloud Messaging into my Android app. The integration should allow for both Data Messages and Notifications to be sent. Change admob ID from remote. Ideal Skills: - Extensive experience with Firebase and Android app development - Proficient in implementing Cloud Messaging - Knowledgeable in creating and managing Data Messages and Notifications Your role will be critical in ensuring seamless and effective communication through the app. Please provide examples of similar projects you've completed in your proposal.

Looking for an experie...this app script which has been fully paid to install this app script and make sure it is working. Furthermore, I require some specific customizations beyond the default Codecanyon video sharing app features. These include: - A custom user interface design - Additional security features - Integration with external APIs The app needs to be available on both iOS and Android platforms. I value a developer with a strong background in app development, particularly with Codecanyon products, and who has the ability to create a unique and secure app with seamless user experience.

I'm looking for a cross-platform (iOS and Android) app that allows my staff to log their working hours. The app should be able to track start and finish times, as well as using GPS to monitor location. Key Features: - Cross-Platform Compatibility: The app should work seamlessly on both iOS and Android devices. - User Authentication: Staff should log in using a simple Email and Password system. - Time Logging: The app should enable users to log their working hours, with tracking for start and finish times. - GPS Functionality: The app should use GPS to monitor the location of staff as they log their hours. - Reporting Function: The app should be able to compile a report of logged hours by week and month, which can be printed out. Also days - PDF Generation: The report ...

I'm facing a build issue with my Expo SDK 51 application. The app shows a blank screen immediately after the splash screen, and I need a skilled React Native developer to help me troubleshoot and fix it. Key Details: - The problem o...React Native developer to help me troubleshoot and fix it. Key Details: - The problem occurs right after the splash screen. - The issue arose after I updated the Expo SDK. - I have attempted to revert to a previous SDK version, but the problem persists. Ideal Candidate: - Extensive hands-on experience with React Native and Expo. - Proven track record of debugging and building for both iOS and Android. - Ability to deliver a smooth and functional application for a cross-device launch. Your expertise is crucial to ensuring a successful and tim...

...employees' working hours. The system will be available as a browser-based tool and a mobile app and will support the integration of physical time clock devices. Additionally, the tool will include features for vacation planning and approval. ##### **1.2 Project Scope** The project will cover the development of the following components: - Browser-based time tracking tool - Mobile app for iOS and Android - Integration with physical time clocks - Module for vacation planning and approval - Licensing functionality for subscription-based distribution --- #### **2. Functional Requirements** ##### **2.1 Time Tracking** - **Browser and App Support**: Employees can log their working hours via a web browser or mobile app. - **Physical Time Clocks**: Employees can clock in and out a...

...there’s no need to provide feedback on features or gameplay—just enjoy the game! 3. Stay in touch with Roman on Freelancer. Once selected, you’ll receive: an email with an FAQ and a link to download the game from Google Play and a message on Freelancer with your unique Invite Code. 4. Note: The game is officially on Google Play in a testing stage. Requirements: 1. A Google Play account and an Android device. 2. Availability to spend 5–15 minutes per day logging into the game for 14 consecutive days. Payment Details: 1. Compensation: $20 USD for 14 days of testing. 2. Non-negotiable budget: $20 per tester. 3. Payment will be processed through the official Freelancer platform via milestones. 4. Upon completing the 14-day testing cycle, the project will be ...

I'm seeking a professional and straightforward Android Java and iOS app, along with a corresponding website, designed for quick commerce in groceries and vegetables. This project will include a user-friendly catalog, a system to display delivery orders, and a separate app for delivery partners. Key Features: - The app should include a payment gateway supporting Credit/Debit Card, Mobile Wallets, and Bank Transfers. - A search system allowing users to find products by categories and subcategories. - A clean, professional user interface without unnecessary complexity or distractions. Ideal Skills and Experience: - Proven experience in app development, specifically for Android and iOS. - Familiarity with creating professional and straightforward user interfaces. - Prior w...

I'm in need of an experienced mobile application developer with expertise in both Android and iOS platforms. My existing app requires immediate attention to some microservices. Key areas needing your expertise: - User Interface: There are layout problems, navigation issues, and some visual glitches that need to be resolved. - Server-Side: I am encountering API failures, database issues, and authentication problems which need to be addressed. Required Skills: - Flutter: As the frontend framework of the app, proficiency in Flutter is essential for fixing and testing UI issues. - AWS: Given that our backend is hosted on AWS, a deep understanding of this platform is necessary for addressing server-side errors. I am looking for a professional who can efficiently troubleshoot and ...

I am looking for a vibrant and colorful grocery delivery app similar to Blinkit, compatible with both iOS and Android. Key features: - Cross-platform compatibility: The app should work seamlessly on both iOS and Android. - User-friendly, vibrant UI: The design should be colorful and lively, appealing to a wide user base. Ideal candidates should have: - Extensive experience in cross-platform app development. - A strong portfolio of colorful and vibrant UI designs.

I'm in need of a skilled mobile app developer who can design and develop a utility tool for Android. The primary focus of this project is to create a highly functional and user-friendly Android application that serves a practical purpose. Key Requirements: - Expertise in Android application development - Proven experience in creating utility tools or similar applications - Proficiency in UX/UI design principles to ensure ease of use The ideal freelancer for this project would be someone who is not only technically proficient but also understands the importance of user-centered design in app development. A portfolio showcasing similar projects would be highly advantageous.

I'm on the lookout for a talented Flutter Developer who can build a secure live video calling app, akin to Tinder but designed for social networking. Key Features Include: - Cross-Platform Compatibility: The app should be fully functional on both iOS and Android. - Real-Time Communication: Utilizing any reliable real-time communication technology for the video calling feature. - User Interaction: Implementing user profiles with bios and a friend request system to facilitate interaction between users. - Secure Messaging: Enabling safe communication between users with top-notch security measures to ensure privacy and protect data. Ideal Candidate: - Extensive experience in creating video calling applications. - Proficient in Flutter, Laravel, and real-time communication technol...

I'm seeking a talented web developer to create an insurance comparison website, primarily focused on price comparison. The site will compare the following types of insurance: API of Applied Systems, CSIO, Various Insurance providers ( 35 ), Product features comparison ( Including writeups and detailed analysis ), Capability to develop in ASP.net. Java React and App on ios and Android including App inclusion on MS system, Azure etc are essential requirements. We may need to include Chatbot trained for the Policy explanation and comparison , Virtual Assistant Integration - Home Insurance - Auto Insurance - Travel Insurance - Business Insurance Key features of the project include: - Integration with various insurance providers' APIs, third-party comparison APIs, and pay...

I'm looking for an experienced app developer to create a messaging and video app like WhatsApp. The app should be compatible with both iOS and Android platforms. Key Features: - Messaging: The primary purpose of the app. - Voice Messaging: An additional feature that sets it apart. -Video chat Ideal Skills and Experience: - Proficiency in cross-platform app development, especially for iOS and Android. - Prior experience in developing messaging and video apps. - Strong understanding of integrating voice messaging features. Please provide examples of similar projects you've completed.

I'm looking for a proficient mobile app developer who can build a cross-platform (iOS and Android) app for me. This app's core functionality will allow users to compare their recorded videos to pre-existing ones within the app. Ideal Skills: - Expertise in cross-platform mobile app development - Strong knowledge of video processing and comparison algorithms - Experience with UI/UX design for mobile applications - Familiarity with both iOS and Android development standards and guidelines - Proficiency in relevant programming languages (e.g., Swift for iOS, Kotlin for Android) Please provide examples of previous similar projects you've worked on.

I'm looking for a skilled developer to transform my WordPress website into a mobile app compatible with both iOS and Android platforms. The app should retain the design of the website, ensuring a seamless user experience. Key Features: - User Login/Signup: Implement a secure and user-friendly registration and login process. - Push Notifications: Integrate a system for sending timely updates and notifications to users. - In-app Purchases: Set up a smooth and efficient in-app purchasing process. The ideal candidate should have: - Proven experience in WordPress to mobile app conversion. - Strong knowledge of both iOS and Android app development. - Expertise in implementing user authentication, push notifications, and in-app purchases. - Ability to replicate website desig...

Project Overview We’re building BioQode, a platform connecting medical practitioners with pharmaceutical companies and related organizations. Our goal: foster secure collaboration for research, clinical trials, and medical development. What We Need • MVP Development for iOS and Android, focusing on: 1. User Registration & Login (Doctors, Pharma Companies, Employees) 2. Profile Creation & Management 3. Home Feed (posts, comments, “Interesting” likes, bookmarking) 4. Messaging (1:1 chat, attachments, voice optional) 5. Colleague Tab (suggested connections, search) 6. Discover Tab (company-driven public posts) 7. Basic Admin Portal (web-based) for user/content management and minimal analytics We have approximately 15 Figma screens detailing the mobile U...

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...optimization (meta tags, descriptions, keywords). Technical Requirements PHP version compatibility (7.4 to 8.3). Support for PHP mail and SMTP configuration. Cron job setup for automated processes and scheduled tasks. Easy installation and setup with documentation. Optional Add-ons (Highly Recommended) AI-powered recommendation system to suggest services based on user activity. Mobile applications for Android and iOS with complete functionality. Advanced SEO optimization (meta tags, keywords, descriptions). Embed code feature for custom JavaScript. Key Notes for Developer The panel must be modern, scalable, and secure to handle high traffic and large volumes of transactions. Ensure seamless integration with multiple API providers with compatibility for all required parameters...

I'm looking for a skilled app developer to create a laundry service app for both iOS and Android. The app will cater to various laundry services including dry cleaning, wash and fold, and ironing. Key Features: - Multi-user Roles: The app should accommodate three user roles: * Customers looking to avail laundry services * Laundry Service Providers offering their services * An Admin for overseeing app operations and managing users - Cross-platform Availability: The app should be optimized for both iOS and Android platforms Ideal freelancers for this project should have: - Prior experience in developing cross-platform apps - Understanding of laundry service operations - Excellent UI/UX design skills to ensure the app is user-friendly - Ability to implement m...

...kids and everything if I leave because everyone knows and likes him. I've already retained a lawyer in Oct 2024 and doing this with them. I made these recordings 100% legally within my rights of the state of WY. I just need dead air time and background noises removed and each clip to shoot straight to the meat of the content and be easy to access and pull up quickly if i need to. I made them on android s22+ with the Smart Recorder app. I downloaded an audio editor app...and ive tried to do this for weeks. And i just cant. I cant stop crying every time and i need some help to get this imperative task done asap. There are some pretty cruel things said. My kids are crying in many. So please if this could be a personal trigger or you have had similar abuse in your history- thi...

**Title: Flutter AI Software - Web Version Deployment Testing & Expansion Project** --- **Project Description:** We are planning to develop an AI-related application using Flutter with a Firebase backend. The source code is built in Flutter and currently supports five platform versions: macOS, Windows, Web, iOS, and Android. At this stage, we will only provide the Web version of the source code for deployment testing to verify whether it runs properly. If the developer demonstrates strong capabilities, we will subsequently provide the remaining four versions for deployment and feature updates. **Project Objectives:** 1. **Initial Phase:** - Deploy and test the provided Flutter Web version source code, ensuring that the entire system (including the Firebase backend) runs ...

**Title: Flutter AI Software - Web Version Deployment Testing & Expansion Project** --- **Project Description:** We are planning to develop an AI-related application using Flutter with a Firebase backend. The source code is built in Flutter and currently supports five platform versions: macOS, Windows, Web, iOS, and Android. At this stage, we will only provide the Web version of the source code for deployment testing to verify whether it runs properly. If the developer demonstrates strong capabilities, we will subsequently provide the remaining four versions for deployment and feature updates. **Project Objectives:** 1. **Initial Phase:** - Deploy and test the provided Flutter Web version source code, ensuring that the entire system (including the Firebase backend) runs ...