Here is the feature list of the next iCarBaby version (Ultra V4.7.1, Pro V3.6.2, Trip V3.5.4, Std/Free V2.8.2):
1*#&. Compass improvement 
2. Support Japanese 
3*#. Support negative value for amount input and statistic 
4. Some user experience improvement --- [u]especially for consumption overview and statistic report module[/u]* 
5*. Improve CSV data export content
6. Fix some bugs

Notes:
*: Fit for Ultra Edition
#: Fit for Pro Edition
&: Fit for Trip Edition