Final developments, improvement And app launch

Hello, I’m looking for an experienced Flutter/Firebase developer or development team to help me complete, improve, and launch my existing mobile application, TreeLogic. The app has already been developed, so I am not looking to start from scratch. I need someone to review the existing code, fix bugs, finish incomplete features, improve the design and functionality, and prepare it for launch on iOS and Android. I want to explain my entire vision upfront so there are no surprises about what the project involves. Here is everything I want TreeLogic to include: 1. Tree Identification Using Photos and AI: Users should be able to take a picture of a tree or upload a photo, and the app should identify the likely species, common and scientific names, characteristics, growth information, care recommendations, and possible visible diseases or problems. The app should explain when identification is uncertain. 2. Accurate City Tree Ordinances and Permits: This is extremely important. The app needs to identify the correct city or jurisdiction based on the property address and provide accurate tree removal and trimming permit requirements, including protected species, trunk diameter measurements, exemptions, and official city ordinance information. I want direct links to official city permit applications and clear step-by-step instructions. We will initially focus on Fremont and the surrounding Bay Area, eventually expanding throughout all nine Bay Area counties, California, and nationwide. All ordinance information must be verified and easy to update. 3. Permit Application Assistance: I want homeowners to easily understand whether they need a permit and what documents, measurements, photographs, or arborist reports are required. The app should guide them through the application process and connect them directly to the correct city permit portal. 4. Connect Homeowners With Tree Companies and Arborists: Homeowners should be able to request estimates for tree trimming, removal, planting, stump grinding, and other tree services. They should be able to upload photographs, describe their project, and connect with participating tree companies or certified arborists in their area. 5. Paid Monthly Subscriptions for Tree Companies: This is one of my main business goals. Homeowners should be able to use the basic app features for free, but tree companies should pay monthly or annual subscription fees to access the full business features. These may include company profiles, customer leads, estimate requests, notifications, business dashboards, and other premium tools. I want different subscription levels, secure recurring payments, and the ability to adjust prices and features as the business grows. 6. Free Wood Chip Exchange: I want a section where homeowners can request free wood chips and tree companies can post when they have wood chips available. Homeowners should be able to enter their location and request deliveries, while companies can post availability, quantities, locations, and delivery options. This should help companies reduce disposal costs and help homeowners obtain free wood chips. Homeowners should access this feature for free, while business features can be included in paid subscriptions. 7. Owner-Controlled Admin Dashboard: I want full control over the application without constantly needing a developer. I need to manage users, tree companies, subscriptions, pricing, city ordinances, permit links, service requests, wood chip listings, notifications, and app activity. 8. Professional Design and Easy Navigation: The app should look modern, professional, and be simple enough for homeowners who know nothing about trees or city permits. It must work smoothly on iPhone and Android. 9. Security and Scalability: I want the existing Firebase backend reviewed and properly secured. The database, authentication, payment processing, photo storage, and user information must be protected. The app should be designed to expand to additional cities and states without requiring a complete rebuild. 10. Testing and App Launch: I need all features thoroughly tested, including login, tree identification, permit information, estimate requests, subscriptions, payments, and the Wood Chip Exchange. I also need assistance publishing the finished application to the Apple App Store and Google Play Store. 11. Full Ownership: I must retain complete ownership and administrative access to the source code, Firebase project, database, developer accounts, payment systems, and everything related to TreeLogic. 12. Project Phases and Budget: I understand this is a large project, and I am open to completing it in phases. My first priority is finishing the existing app, fixing problems, verifying city permit information, and getting a reliable version launched. The subscription system, Wood Chip Exchange, expanded city coverage, and additional advanced features can be organized into clearly defined phases. Before hiring anyone, I need the following: * A review of the existing app and source code. * A clear explanation of what is already working, what needs fixing, and what needs to be developed. * An itemized price for each phase and feature. * A realistic timeline and specific deliverables. * Information about your experience with Flutter, Firebase, AI integration, payment subscriptions, and app publishing. * Any additional costs for APIs, AI services, hosting, or payment processing. * A milestone-based payment arrangement, with work tested and approved before payment. * Written approval required for any additional charges or changes in scope. My ultimate goal is to turn TreeLogic into a nationwide platform that homeowners, arborists, and tree service companies can rely on for tree identification, city permit requirements, professional services, and wood chip exchange. I also want to build a profitable business through paid subscriptions for tree companies. I am looking for someone experienced, honest, dependable, and interested in helping me build this correctly for long-term success. Please review everything carefully and let me know your proposed approach, estimated costs, timeline, and recommendations. Thank you!