Both healthy iPhone users and those with memory problems are needed.

Study activities are done completly from home after the first in-clinic visit, and include:

• An inital visit with a study staff member to determine eligibility, complete an assessment, and set up study devices.
• Over three months, all completed at home: answering two quick questions daily (takes about 2 minutes), using devices to complete tasks and memory tests every two weeks (takes about 90 minutes), and completeing an online survey, a Facetime call, and additioanl tasks every four weeks (takes about 30 minutes).