JustExpenses: Expense tracker1.3 - Google Play

Elegant application for quickest expense tracking.
Feel free to do any proposals. Vote by stars, if you like the app! And don't forget to try out Google's PlusOne +1
This is NOT a budget-tracker or accountant application, nor it is a Calculator - it is a handy tool to quickly (really quickly) write down what you've just spent your 20 cents for.
It has nothing extra (neither in interface, nor in functionality). It is small in size, much smaller than most others.
It is "simple" cause you don't need complexity in small things and don't want to spend your time on clicking extra buttons. You don't need to track budget when you buy ice-cream :), but surely it's an important expense to remember it (remember: you ARE capable of GREAT things, but Life also consists of small things).
It is nice and very powerful for such a small app:
+ It has just what you need to track money spent
+ pleasure to use: no extra elements on screen, nice paging
+ quick: write down expense in 2 types + 2 clicks
+ easy, intuitive
+ it IS powerful enough: sorting, filtering, grouping, QuickSum, QuickTag, QuickGroup
+ export to CSV

Features:
Exclusive:
+ QuickTag button - don't type expense, click on it
+ QuickSum button - extremely useful feature - walk thru your expenses in QuickSum mode, clicking on them to see the sum of the expenses you just clicked on
+ QuickGroup button: group/ungroup your expenses to see how many times you did concrete spending
+ QuickTag widget

Standard:
+ Filter expenses by tags (expense name)
+ Sort your data by Tag, Date, Amount ascending or descending
+ See your expenses by days/weeks/months/years - click on the date to choose the date interval type.
+ Easy paging (swipe, fling, finger-slide ;)
+ Export to CSV

Welcome any suggestions!
Third-party software used:

http://code.google.com/p/android-dateslider/- Pretty date chooser - many thanks to the author for the nice product.
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