Tidal Pool: Tidepool Timing

Live NOAA & CHS low-tide windows for 33 US & Canada tide stations, a year of minus-tide dates, and 73 hand-written species cards.

Tidal Pool helps you choose the right time for a tidepool visit and understand what you find there. It combines official tide predictions, a hand-written field guide, local ethics, and a private field journal in one calm app for the coasts of the United States and Canada.

YOUR NEXT LOW TIDE See the next low tide at your selected coast, the exact time, height in feet, and a 24-hour tide curve. Daylight and below-zero windows are easy to spot. Predictions come from NOAA Tides & Currents in the United States and the Canadian Hydrographic Service in Canada.

THE 12 BEST WINDOWS The minus-tide calendar highlights the twelve lowest daylight tides at your station so you can plan exceptional days months ahead.

73 HAND-WRITTEN SPECIES CARDS Browse 73 curated intertidal species from the Pacific, Atlantic, and Canadian Maritime and Pacific coasts. Filter by coast, tide zone, or safety. Each card explains habitat, identification, range, ethics, and whether to keep your distance.

Review coast-specific etiquette and quick first-aid guidance for creatures that sting, bite, or pinch. Tide pools are living habitats: observe gently and leave every animal where you found it.

MEASURE WITHOUT LIFTING Estimate an animal’s size in your own photo using a common coin for scale. Nothing needs to leave the pool.

YOUR PRIVATE FIELD JOURNAL Save sightings with a photo, place, tide height, and species. Journal data stays on your device, and location metadata is removed before you share a photo.

PRIVATE BY DESIGN No account. No ads. No analytics. No tracking. Core reference content works offline after installation.

FREE DOWNLOAD, THEN ONE-TIME UNLOCK Start a 3-day free trial with full access. The trial is local and does not start a subscription or charge your App Store account. After the trial, one purchase permanently unlocks the app. Restore purchases at any time. No subscription.

Tide predictions are for general planning only and are not suitable for navigation or safety-critical decisions. Tidal Pool is an independent app from Rizk Corsight, LLC and is not affiliated with or endorsed by NOAA or the Canadian Hydrographic Service. Includes data from NOAA Tides & Currents (public domain) and the Canadian Hydrographic Service, Department of Fisheries and Oceans.