This Application was developed as part of a research study to explore the possibility of using smartphones to administer cognitive tests and recording various data during such tests that can aid the detection and prediction of the onset of Alzheimer’s Disease (AD) or other AD-related dementias. This initial study is designed simply to collect from approximately 100 adult research subjects, such as yourself, results from various smartphone-based tests (including but not limited to answers to survey questions, data from video and voice recordings, accelerometer data, etc.). The goal is to demonstrate such data can be recorded with sufficient precision that differences between subjects are both detectable and measurable, such that they may eventually serve as useful diagnostic data for clinicians. No attempt will be made during this study to detect or predict dementia.