Math Ref FREE on iPhone / iPad

Math Ref Free is a free version of the great math reference application, Math Ref. This app gives you just a sample (over 600) of the many (over 1,300) helpful formulas, figures, tips, and examples that are included in the full version of Math Ref. So, if you're a student, teacher, or need math for work and want to try before you buy, this app is for you.

Download link: http://itunes.apple.com/us/app/math-ref-free/id312756358?mt=8#