Slackwater
Tide tables · iPhone
Your tides, with no signal.
Add a NOAA station and Slackwater saves its high and low tides for the past year and the year ahead. On the boat, at the beach, anywhere the bars run out, they're already on your phone. Each station tops up when you open the app online.
Free
2 stations
High and low tide times and heights, a tide curve, sunrise, sunset and moon phase, offline tide alerts, Home Screen and Lock Screen widgets, light and dark looks. No ads, no account.
One purchase
Unlimited stations
Add every coast you visit with one payment. Not a subscription. Nothing else is paywalled.
3,400+ NOAA stations: US coasts, Alaska, Hawaii, Puerto Rico and Pacific islands. High and low tides only. Tide data from NOAA; predictions are estimates and weather moves real water. Not for navigation.