iPhone aviation applications, what do you recommend & use?

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i Phone 'Aviation Apps'

Thought I would start a thread on apps for the i phone that come in useful for flying.

So far I use:

Pilot Wizz - Does loads but weight and balance & weather particularly well

Weatheronline.co.uk - Gives you a weather radar with 2 min delay

Flight com uk - A simple list of uk airfields and frequencies

Sunrise Free - A simple sunrise/ sunset time app

Thats all from me......