BIG App is a versatile mobile application designed to enhance the living experience for clients of BI Group. It serves as an ecosystem for online services, enabling users to conveniently select and purchase various services that improve home comfort. Key features include the BI Click service for real estate transactions, allowing users to explore property options, sign contracts online, and manage payments and documentation seamlessly. Additionally, the app offers a history of transactions for easy reference.

The app also includes BI Service for managing interactions with building management, facilitating service requests, utility payments, and expense reporting. Users can access BI Club for loyalty rewards, BI Cleaning for cleaning service bookings, and SmartRemont for turnkey renovation services. Furthermore, the Connected Home feature provides smart home solutions, enhancing safety and convenience with options for security sensors and smart device management.