What about "decibel" to test exhaust noise?

Sound level. Free too!

I wouldn't think the I phones mic can handle much level.

You can get cheap hand held spl meters at radio shack. Like the one that you use to set up your home theater levels, they can do both "A" and "C" weighting.

Nort I thought you still had a brick phone?

Or was it bag I forget?

I use Navitronics US WEST, and EAST LAKES. Cant remember what they cost but they even work on the Ohio to show bouys. As far as weather goes I LOVE the Weather Channel. You can also make a link from Safari on your home page to www.crh.noaa.gov to view your local hydrographs

There's also a Miss Geico app.

Don't have a link, but I do have a screencap.
You can probably figure out why.

Harbor Master

You get to play harbor master (they have a "lite" version too).

Not boating but a real time SUCK!!!

"Angry Birds"

I use the weather channel max. Works great for weather, and radar!