The app is specially designed to detect early symptoms of the form of dementia called frontotemporal dementia. Less than five percent of people with dementia have frontotemporal dementia and it is difficult to detect in the early stages. Frontotemporal dementia often affects people when they are in the middle of life, unlike, for example, Alzheimer’s, which often affects older people. All types of frontotemporal dementia are progressive and end in severe dementia.