Terms, in plain words

Halo is a free, open-source prototype. Using it means agreeing to these few points.

What Halo is not

• Not a medical device. It doesn’t diagnose, treat or measure face blindness or anything else. If you have questions about your health, talk to a doctor.
• Not an identity check. Never use it for security, safety, access, payment or legal decisions, or to decide who to trust or let in. It can name the wrong person and it can stay silent for someone you know.
• Not a way to identify strangers. It only knows people who agreed to be added, and it can’t look anyone up.

Your responsibilities

• Consent. You’re responsible for asking each person before you add them, for adding children only with a parent’s or carer’s agreement, and for removing anyone the moment they ask. Halo records that you asked; it can’t check.
• The law where you are. Taking photos of people and keeping notes about them may be covered by privacy or data-protection law where you live. Use Halo for your own personal use, with people who know.
• Your phone. Your people are stored on your phone. Keep it locked, use Halo's own lock if others use your phone, and keep your backup passphrase safe: nobody can recover it for you.
• Out loud. Without earbuds your phone speaks whispers aloud. The earbud check and quiet hours help; you decide where to use it.

Optional Enhanced mode

If you turn on Enhanced mode, short text is sent to Halo's server, which uses Cloudflare Workers AI. Use of those models is subject to Cloudflare’s terms. What is sent is listed on the privacy page and in the app.

No warranty

Halo is provided as it is, without any warranty, under the MIT licence. It is a prototype, tested so far mainly on AI-generated faces, not yet with people who have face blindness. Its accuracy is described honestly on the safety page.

Open source

The code, these pages and the tests that check them are public under the MIT licence. Third-party parts and their licences are listed in the repository’s CREDITS file.