[iPhone God App] It was found using the Clam Tide actually

Clam Tide for iPhone is an application that provides tide predictions right on your mobile device without any need for a network connection.

With Clam Tide, you can select a location or let the iPhone's built GPS select the location for you. In moments, you'll have a weeks worth of tide predictions at your fingertips.

Clam Tide is a convenient way for the beach comber or clam digger to check the tides for a favorite beach location.

********* NOT FOR NAVIGATION ********

Agencies like NOAA exist because there is a need for certifiably
correct tide predictions. Please don't rely on this appllcation if you need
guaranteed results.

Clam Tide is based on the XTide tide prediction software and is free software under the terms of the GNU General Public License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.