Rinnai SmartLink app allows users to control Rinnai boilers, steam ovens, and room units from anywhere using a smartphone or tablet. It offers basic functionalities along with unique app-specific features and notification services for convenient usage of Rinnai products.

The app's key features include heating/water control, pre-set notifications for leaving/returning home, personalized alerts, status changes/caution/error notifications, smart reservation, user management, and usage instructions for boilers. For the 5-tier steam oven, it enables control over steam/convection/combi cooking modes, saving favorite recipes, cleaning functions, cooking start/end notifications, user management, and usage instructions. Additionally, for room units, it provides heating/water control, pre-set notifications for leaving/returning home, error alerts, user management, and usage instructions.