TideDeck Has Launched on the App Store
- Reece Smith-ward
- Jul 23
- 3 min read
Today we are delighted to announce that TideDeck is available now on the Apple App Store for iPhone and iPad. It is the newest member of the Maritime Master family of apps, launched in July 2026, and it brings tide times and charts for anywhere on Earth straight to your pocket.
TideDeck is made by Maritime Master Limited. It is built for anyone who likes to keep an eye on the water, and it is designed from the start as a planning and interest tool rather than a navigation tool. Here is what it does and who we made it for.
Tide Times Anywhere on Earth
At its heart, TideDeck computes the tide on your device. There is no account to create and no connection needed to get a tide time. The home screen shows the current water height, whether the tide is rising or falling, and the next high and low with a live countdown. You can scrub the day's curve with a finger and feel a gentle haptic tick at each high and low, with day and night shading, a live now marker, clear HIGH and LOW labels, and a full table of times and heights.
Built for Water Watchers
We made TideDeck for the people who watch the water: swimmers, paddlers, anglers, rock-poolers, photographers, dog walkers on tidal sands, and slipway users. A built-in offline index of over three thousand coastal towns, harbours, piers, beaches, marinas, and slipways helps you find your spot quickly. You can search by name, state, or station ID, see nearest stations, enter coordinates by hand, and save your favourites.
Measured and Modelled Tides
Along US coasts, TideDeck computes tides from published harmonic constants for 1,302 measured NOAA stations, and these are clearly badged as exact. Everywhere else, tides are modelled from global and regional ocean models, labelled as modelled, with the distance to the nearest measured station shown. You always know how the number in front of you was produced.
Charts, Sun, and Moon
Beyond the daily curve, TideDeck offers a best days ahead view of the lowest and highest water coming up, along with week and month charts that show the swing from springs to neaps, and a tidal character card. It also includes sun and moon data such as sunrise, sunset, moon phase, illumination, and day length, plus an interactive scene of how the Sun and Moon line up. A built-in Tide School helps you understand what you are looking at.
Works Offline, Made Accessible
Tide predictions, curves, and planning all work fully offline, while weather, live observations, and map search do need the internet. TideDeck ships with five themes that are contrast-checked in light and dark, a high-legibility reading mode, heights in metres, feet, or a mix, and full Dynamic Type. The animated backdrop respects Reduce Motion and Reduce Transparency.
Free to Download, with TideDeck Pro
TideDeck is free to download. For those who want to look further ahead, TideDeck Pro extends the forecast horizon to a full year ahead and is available as an annual subscription or a one-time lifetime unlock.
A Planning Tool, Not Navigation
TideDeck predicts the height of the tide above a reference level. It does not know the depth of the water or the level of the seabed, it does not include storm surge, wind, or barometric effects, and it does not predict tidal streams. It is a planning and interest tool, not a nautical publication. For navigation, always use official tide tables, official charts, and your harbour authority. Predictions are exact at the 1,302 bundled US stations and modelled (approximate) elsewhere.
