Purpose: This research aimed to integrate three previously developed assistive technology (AT) systems into one modular, multifunctional system, which can support people with dementia and carers throughout the course of dementia. In an explorative evaluation study, the integrated system, called Rosetta, was tested on usefulness, user-friendliness and impact, in people with dementia, their informal carers and professional carers involved. The Rosetta system was installed in participants‘ homes in three countries: The Netherlands, Germany and Belgium.