You can choice difficulty (1 digit addition or 2 digit addtion) on menu button.
This record the number of right answer for adding 2-digit numbers ^^
Change answer numbers to sorted order for reducing the time for looking for answer number..^^
More from developer
SW development project faced during the process and the products are subject to experience.
SOW, Charter, Scope Statement
WBS, WBS Dictionary
For "saembakui 50 sentences" for the application is memorizing.
Currently does not open properly www.50english.com
Did not get permission to use information about the statement I've ever been.
So this application will be deleted saembakui if requested voluntarily.