5.6
2020-06-15
Bugfixing and improvements
5.5
2020-06-02
Bugfixing and improvements
5.4
2013-08-24
Improvements and Bug Fixes
4.0
2012-05-08
Added a multiple choice self-test feature in every lesson.
3.0
2011-10-27
Every lesson now includes multiple video examples, interactive practice problems, a challenge problem, a worksheet of extra problems, and a notes page.
2.0
2011-08-24
Universal App for iPhone and iPad
1.1
2011-04-25
implemented iAds