I MUST MUST MUST say that when I was using my GPS app on my phone on the boat, I was getting splashed with water (waves) - and my phone was getting splashed too - so thought hey, time to get a waterproof case for it - and I found one that is absolutely UNBELIEVABLE - it is a vacuum case that if you want to, you can buy waterproof earbuds so that you can swim WITH your iphone or smartphone and listen to music at the same time (IF you want to) - but this case is unbelievable - the touchscreen on my phone works just as well with it on as without, which is saying something - and it protect the phone brilliantly - here's a link if anyone is interested as it is well worth buying if you are a boater or swimmer and want to use your phone. It says it's waterproof to 100 feet - I haven't tried that - it has fallen in the water and was fine - this is a good case. Every once in a while I get a gadget or accessory that I can't live without, and this is one of them. It is really strong, but I put my phone in it, seal it shut, and then out on the boat I don't care if it falls in the water or gets dowsed in water - your phone is SAFE!!! It's called a DRYCASE. I got mine on amazon but I'm sure there are other places you can get it.
Amazon.com: DryCASE Water-Proof Case for iPhone, iPod, Smartphones, and More (DC-13): Electronics
Amazon.com: DryCASE Water-Proof Case for iPhone, iPod, Smartphones, and More (DC-13): Electronics