I recently bought a Samsung Galaxy S Plus smartphone, to replace the - crappy - Blackberry I was using. Android phones are pretty much the same as the iPhone (indeed, Apple and Samsung have each accused the other of stealing ideas) and there are plenty of cool apps to download.
I have found a brilliant little app from Marinetraffic.com, via Android Market, a free app which gives you the AIS positions of ships. If you touch the little ship symbol of the vessel you want to look at, a wedge-shaped coloured icon, you can also see the vessel's name, data, track, and, best of all, photos. Very cool. If you have an Android phone, you can get it here, or via the Market on your phone.
However, a couple of negatives are ads - well, it is free - and it does hang on occasion.
There is also an iPhone/iPad version available but, unlike the Android version, that costs a couple of quid.
