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A bar code scanner that then compares the price of the product to other local stores?

Or an app that works with Google maps which downloads the menus and stuff from restaurants as you go through towns, so you can always find a good place to eat?

Or an app that can tell you how to get to another destination, but it can offer loads of different options, like the cheapest option, the fastest option, the greenest option, that kind of thing.

You just need to think about inconveniences in life, and think how those problems can be solved.