Birding iphone apps

Here are my five 'must have' birding apps for the iphone.  These aren't id guides or the like, these are for increased birding productivity - how to make the technology in the iphone work for you.

FiRE 2
A fantastic sound recording app.  Has the ability to add gain to your recordings, and also upload them straight to Soundcloud.  Has been very useful to record Sibe Chiff calls while out birding and I'm hoping to use it during this coming vismig season too.

Clicker+
A really simple counter app.  One click adds one to the counter, its as simple as that.  It's much quicker than a traditional metal clicker and great for counting roosting gulls!

Camera+
Just a bit better than the standard camera app.  The biggest benefit of this one is that you can set a separate exposure area to the focus point.

Outside Maps
The official OS app where you can download the very useful 1:50,000 scale maps.  These give you all the footpaths and tracks you need when out birding.

MyMedia
This is simply an app to help you store downloaded files on your iphone.  I find this most useful when I want to find a song or call from the excellent xeno-canto.org website.

Are there any I've missed?  Please leave a comment if you have found an iphone app that might be of use while our birding.