What is the One Today privacy policy?

It is the Google Privacy Policy.

If you downloaded the mobile app, your donations, matches, and other actions in One Today are public, linked to your Google+ identity (with your name and profile picture) and could be visible to other One Today users.

If you use the web version of One Today and have not downloaded the app, you can choose at the time you make your first donation whether you want donations, matches and other actions on One Today to be public.