Download the Mint app after you set it up online at Mint.com

It's very secure (secure enough) and easy to use for exactly what you need and much more...

 

Hey grasshopper - reason has no place in an argument with a woman. Installing this app will not help you, in all likelihood it will start a more serious fight.

Just my opinion

 

mint, but first you have to set it up on a computer

 

If your bickering about money now and your just dating then dump her because it will only get worse. I would say keep her if she paid for everything but with her being that tight with money and she makes 60K more a year than you then wait till you get a real job and she makes her money and spends yours... dump her before she makes you sign a prenump (or kids) and keeps all you ever make

But the fascinate calculator will keep a running tab it is called history.... what you should make your girlfriend

 

If money is an issue, start splitting checks and each of you buy your own stuff. Seriously, it's not worth arguing over.

I don't know of an app to keep a running tab of money spent, other than Mint. I use that to keep track of all my finances, but I don't think it will do what you want.

 

I like P Finance (maybe its Personal Finance in the Market). Gives delayed stock quotes and does a ton of other finance stuff too all in one free app.
I think it has a section to track expenses and will do what you need.

Good luck!