I have an app idea for the iPhone?

I've had an idea for an app that lets users keep track of their money so like they put in their monthly income and track what's they are spending on bills, shopping and extras, ETC. I wasn't sure if this was a good idea or not, just looking for some advice on possibly how to improve the idea if it is good or find out if its not. Thanks and i will be developing the app myself not outsourcing it.

What

It's a very simple idea, and I'm sure there are others like it. You might want to find a way of making yours stand out from the crowd, there's probably lots of competition in that area. I don't know quite how you'd go about doing that though!

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