Tideline: Offline Tide Charts

Tide predictions for every NOAA station, computed on your phone. Tideline makes no network request at any point after you install it. WORKS WHERE YOUR SIGNAL DOES NOT Most tide apps ask the internet. Tideline does the astronomy itself, from harmonic constants published by NOAA and bundled with the app. Down a canyon, offshore, on a beach with no bars, in airplane mode — it just works. WHAT YOU GET • 3,493 NOAA tide stations: 1,251 reference stations and 2,242 subordinate stations • The full tide curve for any day, not just a table of times • High and low water with heights above mean lower low water • Where the water is right now, and whether it is rising or falling • Times shown in the station's own local time, daylight saving handled correctly, computed offline • Find the stations nearest you, or search by name or state BUILT TO BE RIGHT Tideline uses the harmonic method, the same one…