Shoreline Defender™

Shoreline Defender™

Tide & Legal Beach Check

49 ratings
22 reviews
Free

Details

  • Released
  • Updated
  • June 17, 2025
  • March 27, 2026

Features

Shoreline Defender™ screenshot #1 for iPhone
Shoreline Defender™ screenshot #2 for iPhone
Shoreline Defender™ screenshot #3 for iPhone
Shoreline Defender™ screenshot #4 for iPhone
Shoreline Defender™ screenshot #5 for iPhone
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About

This app forecasts public beach access boundaries using live tide data, topographic modeling, and augmented reality. It visualizes the Mean High Water Line, the legal public access boundary in many areas, providing clarity for visitors and officials.

Forecasted access boundaries
Predictive tidal mapping
Color-coded access zones
Augmented Reality (AR) view
Live NOAA tide data integration
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What users say

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What's New in Shoreline Defender™

5.0

March 27, 2026

This update from Apple will improve the functionality of this app. No new features are included. Performance Improvement

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User reviews

Good idea but needs some improvement

I am all for the defending of public beaches, and educating the public on their rights but there is definitely room for improvement on this app and its user interface. The app is pretty confusing and doesn’t work very well. I am sitting on the beach and decided to pull it up to check and I have no clue how to make sense of where I am supposed to be. I looked through the tutorial and that was no help. I support this app and its purpose 100%, but as others have said without accurate reporting this app can just lead to more trouble.
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Useful but confusing…

I am at the beach. Please add a simple feature. Vertical feet and estimated horizontal feet above current water line (approximately where it looks wet.)

I know this is art and science, but this would be easiest to understand.

Advocates for illegal trespassing!

This app is a disaster! The boundaries to show where private beaches meet public are inaccurate and change consistently. The App will suggest users to trespass on private property, risking fines or jail time with zero accountability. At the end of the day this app is an attempt to violate the rights of private citizens to own and protect their property. Just because someone was able to purchase beach property does not mean others get to trespass, steal, and use it for free.
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Dangerous app with bad advice

I tested this out on a beach I know well and the information provided in it is not accurate and the “advice” provided could have you arrested for trespassing. This may provide decent information for shorelines that are stable, but most barrier islands do not have stable shorelines. The advice given in this app would make a person believe they have a right to be in peoples homes (literally). The “advice” this app gives you will put you in harms way.
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Not working

Idk if the app is down right now but I just downloaded it today (dec. 12 2025) and it does not work at all

User experience

🐞

Reported Bugs

2 issues

Clunky and confusing navigation

Bug

Potential GPS issues

Bug

Requested Features

2 requests

Dark mode option

Feature

Improved GPS accuracy

Feature

FAQ

What does Shoreline Defender do?

Shoreline Defender is a forecasting tool that helps users visualize where public beach access is most likely located. It uses live NOAA tide data, advanced topographic and bathymetric modeling, and Augmented Reality (AR) to forecast the Mean High Water Line (MHWL), which is the legal boundary for public access in many coastal states.

What are the key features of Shoreline Defender?

Key features include forecasted access boundaries based on NOAA tide gauges and coastal slope data, predictive tidal mapping showing how access changes with tides, color-coded access zones for easy understanding, and an Augmented Reality (AR) view that overlays the modeled shoreline boundary onto your phone's camera feed.

Is Shoreline Defender free to use?

Yes, based on the provided information, Shoreline Defender is a free application. It does not have in-app purchases or advertisements, making it accessible for all users interested in coastal access information.

Who is Shoreline Defender built for?

This app is designed for a wide range of users including coastal visitors and residents seeking clarity on access, local governments and enforcement agencies, attorneys and investigators, planners and researchers monitoring shorelines, and civic tech investors interested in public-interest tools.

What is the Mean High Water Line (MHWL) and why is it important?

The Mean High Water Line (MHWL) is the legal boundary for public access to beaches in many coastal states. Shoreline Defender forecasts this line by combining topographic elevation, bathymetric coastal profiles, and real-time tidal inputs, providing crucial clarity for public access rights and stewardship.