Optional
Contributing is a choice.Using Balance doesn't depend on it.
The app works the same whether or not you contribute. Contribution is off until you turn it on, and you can turn it off again whenever you like.
The project
If you want, your phone can send pseudonymous, de-identified daily signals to a project that belongs to everyone who contributes. Nothing personal, nothing sold, and you can erase it all.
What leaves the phone, if you contribute
What never does
Optional
The app works the same whether or not you contribute. Contribution is off until you turn it on, and you can turn it off again whenever you like.
Who it belongs to
The data is never sold and never used for advertising. Manifold does the engineering and keeps it running; it does not make money from what you contribute.
What gets built
Contributed signals are used only to build models that come back to the contributors, inside the app. The long-term aim is a model for each person, fitted to your own pattern, rather than a population average.
Later
Researchers or hospitals may one day ask to work with the project. If they do, it will be on terms the contributors set, not the other way round.
Leaving
Stop contributing and erase everything from the app. The server deletes everything under your pseudonymous id and answers with a receipt that counts what it removed. How we handle personal data is in the privacy policy.
You turn contribution on from inside the app, whenever you're ready. Get the app first; the choice comes later, or never.