What is a good idea for a new iPhone app?

I have been thinking a lot lately and really want to do something that would make people's lives a lot easier. I have been trying to brainstorm ideas on an app that I would like to create. Does anyone have a good idea for an app that they would like to see? If so, how much would you pay for it?

Obviously ideas are part of that, if you can't come up with your won then none of it really matters.

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