Open Waters
Apps for time on the water.
Tools for reading the tides, finding slack water, and settling into a night watch. Here’s what you can use today and what we’re working on.
Available now · iPhone and Apple Watch
Slackwater
The tide and currents app that works without signal.
See tide heights around the world and tidal currents across the US and Canada. Find the next slack, max flood, or max ebb, with predictions computed on your device, even when you’re offline.
The core app is free, with no ads and no account to create.
Android coming soon.
Explore Slackwater →
Setup guide · iOS only
Nightwatch
A red display for the night watch.
Set up a red tint across your iPhone, including other apps and the lock screen, using the display settings and Shortcuts already in iOS. Nightwatch is a working set of instructions you can follow today.
Set up Nightwatch →