This app provides a notary service that lets you prove that an action, event or idea occured before or at a given date and time.

You record the action, event or idea as a photo on your iPhone and then use our app to "notarize" the photo. To do this our app will create a digest of your photo and send that to our servers. This digest is then recorded along with its date and time. Your photo is never disclosed to us and we have no way of reconstructing your photo from the digest.

You then keep your photo, and if you ever need to prove the time and date of the action, event or idea recorded by your photo, you can pass on a copy of your photo to another person and they can "authenticate" the date it was notarized using either this app or on our website at notenda.com.

Authentication re-creates the digest from the photo and then sends that to our servers. If there's a matching entry from when the photo was notarized, the photo is authenticated, and the date and time of notarization is returned.