Realtime TIDE calculation at your GPS position. YES! Our unique copyrighted alghorithm is able to calculate the TIDE at any GPS location in the world. No need to figure out your Lat, Long or Zip Code. Your iPhone or iPod Touch figures it out for you. DO NOT REQUIRE INTERNET CONNECTION Try it, you will love this app and its features ! • Top Ten since 2011! • Featured in : On the Deck!