Support

We reply within two business days.

Contact

Email slackwater@nextep.watch. If you're reporting a problem, include your iPhone model, iOS version, and the station name.

A station says no tides downloaded yet

Each station needs one connection to download its tides. Open Slackwater somewhere with signal and tap Try again. After that the station works offline.

How long do saved tides last?

Each station keeps the past year and the year ahead from the day it last downloaded. Slackwater tops a station up when you open the app online and it is running short. There is no background refresh, so open the app online now and then.

My tide alerts stopped

Alerts are built on your phone from the saved tides, so they work offline. iOS holds only 64 waiting notifications at a time, so Slackwater tops them up each time you open it, and the last one reminds you to. If alerts never arrive, check Settings › Notifications › Slackwater.

Widgets

Long-press the Home Screen or Lock Screen to add a Slackwater widget, then choose its station with Edit Widget.

Bought unlimited stations, still limited?

Open Settings in Slackwater and tap Restore purchase. The unlock is tied to your Apple Account and comes back on any iPhone signed in with it, including after a reinstall.

Refunds

Apple handles every purchase and refund. Go to reportaproblem.apple.com, sign in, and choose the Slackwater purchase.

Not for navigation

Slackwater shows NOAA's astronomical tide predictions. They are estimates, and wind and weather move real water. Do not use Slackwater for navigation.