Does it have a tide chart, not just a table?

Yes. The home screen is a full 24-hour tide chart with a marker for now and every high and low tide. People told us "no graphs = not very useful", so the graph comes first.

Does it work offline?

Yes. Tide times are calculated on your phone from harmonic constants, so it works on piers, boats and beaches with no signal. No account or sign-in.

Can I see more than the next five days?

Yes. The calendar shows the first high tide for every day of the month, and you can swipe the chart to any date.

Is there a 12 hr time option?

Yes. Choose 12-hour or 24-hour time, feet or meters, and MLLW or mean sea level in settings.

Will it show tide changes when in different areas or countries?

Yes. About 8,700 stations across the US, Canada, Japan, Europe, Australia and more, each shown in its own time zone with daylight saving handled. Korea is not covered yet.

Can I save my favourite place and local beach?

Yes. Star any station and switch between favorites with one tap. The widget shows the next tide for your favorite.

Can I use it for navigation?

No. Ebbline shows predictions only and is not for navigation. Predictions do not include weather, storm surge or river flow.

Yes. Every feature, including alerts and the widget, is free and supported by ads.

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How to read a tide chart

A tide chart plots time along the bottom and water height up the side. The peaks are high tide, the troughs are low tide, the upward slope is a rising (flood) tide and the downward slope is a falling (ebb) tide. Most coasts get two highs and two lows a day, about 6 hours 12 minutes apart.

Four things the curve tells you

Shape	Meaning	Useful for
Peak	High tide	Pier fishing, surfing at high tide
Trough	Low tide	Tide pooling, beachcombing, rockhounding
Upward slope	Rising tide	Time to leave the flats
Steepest part	Fastest change	Strongest current

The curve is steepest roughly halfway between high and low tide, when the water level changes fastest.

What the height numbers mean

Tide heights are usually measured above chart datum. In the US that is MLLW (mean lower low water), which is why low tide can read 0 or below zero. Switch to mean sea level and 0 becomes the middle of the range.

How Ebbline helps

Ebbline draws the full 24-hour curve with a marker for right now, plus rising or falling and the time until the next high tide. Switch feet or meters and MLLW or mean sea level in settings. Predictions only, not for navigation.

See today's tide as one curve

Get Ebbline on Google Play