Mezurio is now part of the GameChanger Study, a collaboration between the UK Alzheimer's Society and Oxford University's Big Data Institute. Mezurio is an important part of several research studies. The app lets you complete interactive, scientifically valuable measurement tasks. It helps you become an even more valuable part of that research by letting you contribute different kinds of data: quickly, frequently, and from the comfort of your own home. To use this app, simply download it, then type in the invite code you were given by your research coordinator. At the moment it is only possible to use this app if you are part of an approved, ethically reviewed research study. Once you’ve joined a study, the app will send you a notification whenever there is a new task ready for you to complete. Most tasks will only take a few minutes of your time. Thank you so much for using this app. Your data will help our team at the Oxford University Big Data Institute to develop open, freely available, digital approaches to understanding health.