Works offline. No account.
Your tide, your spots, your bite.
Slackwater shows the tide curve and times for the places you fish, surf, and boat, plus the solunar bite windows you plan around. The core works with no signal, because the coast is where signal dies.
Works offline · No account · No ads · Tide data from NOAA
Glanceable truth
Open the app and see today's tide curve, the next high or low, and the bite rating for your spot. Widgets and the Apple Watch make it a one-glance habit.
No signal needed
Tide and solunar are computed on your device from NOAA harmonic data, so the app is fully usable on the water. That is the difference from online-only apps.
Private by design
Your spots and settings live on your device and sync through your own iCloud. There is no account, no ads, and no tracking.
Built for anglers, surfers, and boaters
Free shows the tide curve and times for a few saved spots. Premium adds full solunar bite ratings, a 7-day forecast, smart alerts, and unlimited spots, for less than half what the social apps charge.
See pricing
A tide page for every spot
Looking up one beach? The web has a tide page for hundreds of US tide stations, computed by the same engine as the app, so the times match what you see on the water.
Browse tide times →Know the tide before you go.
Free to start. No account, no ads, and it works when you are out of signal.
Download on the App Store