Digital Health Technologies for Progressive Supranuclear Palsy and Dementia With Lewy Bodies

Inclusion Criteria: * Male and female participants aged 40-89 meeting clinical diagnostic criteria for probable PSP, probable MCI-LB or probable DLB. * Able to be present for all study procedures, complete questionnaires and assist during home data collection. * Eligible participants must be fluent in reading and speaking English and must be capable of providing informed consent based on the principal investigator's judgment. * Must have a caregiver or study partner who is willing and able to assist with all study-related procedures. * Ambulatory (able to take 10 steps with minimal support such as use of a cane) Exclusion Criteria: * Any neurological, medical, or psychiatric condition that would preclude or confound participation in study activities based on the investigator's judgment. * History of frequent falls defined as more than 5 falls per month, will not be eligible to participate in the study.