Contact us

We're happy to help with your tour, your purchase or anything else.

About us

Modicum Explorer is a brand of Modicum International LLC, based in Napa, California. You'll find us at Coit Tower, 1 Telegraph Hill Blvd, San Francisco, CA 94133. We make self-guided audio tours that play in your phone's browser: no app to install.

Need help with a tour?

If a tour won't open or play, email us with the address you used at checkout and the phone you're using, and we'll get it working. Your order code is in your receipt email.

Please read our Terms, Privacy Policy and Refund Policy.