Calculator for app development cost estimation using Flutter developers in Singapore, Canada, and the UK for Real Estate applications. This calculator is designed for apps that facilitate property searches, listings, virtual tours, and agent-client communication. Flutter, Google's UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase, can potentially offer cost savings and faster development times. Developer rates for Flutter specialists in Singapore, Toronto/Vancouver (CA), and London (UK) will be considered. Core features influencing the estimate include advanced property search filters (location, price, size, amenities), high-resolution image and video galleries, interactive map integration (e.g., Google Maps API) with property overlays, user account management for buyers, sellers, and agents, and mortgage calculation tools. The calculator will factor in the complexity of integrating with Multiple Listing Services (MLS) feeds for up-to-date property information, implementing virtual tour functionalities (360-degree views, Matterport integration), and scheduling property viewings. Push notifications for new listings or price changes are also common. Backend development needs to manage large databases of property listings and user data securely. Considerations for data privacy and compliance with local real estate regulations in SG, CA, and UK are important. Post-launch, costs for database updates, adding new features like AI-powered property recommendations, and customer support will need to be budgeted.