
Overview
2026 · Sea glass, resin, microcontroller, OLED display, rechargeable battery, companion web app
An apparatus for coastal apparitions, this stone tells the tide. Behind its sea-glass window: the moon phase, the height of the water, and the tide either rising or falling at your selected beach.
In Tampa Bay, low tide reveals the intertidal zone for shelling and exploring. High tide invites manatees, dolphins, and sharks, a time to snorkel, surf, or kayak.
Tidestone, with its window to the outdoors, is a reminder to seize the moment while you have it.
On view
Tidestone v0 is currently on view at tiat in San Francisco until November 22.
Free web version, To & Fro: tide.kateander.com

Tidestone v0

To & Fro, a tidal clock (online)
To & Fro, a tidal clock (online)

Process photo

Early render