Hello for all. I'm a mobile application developer, and I want to introduce you useful tool for Android phones and tablets - mathematical function grapher.
It supports standard graphs y=f(x) and x=f(y), parametrical graphs x=f(t);y=g(t) and graphs in polar coordinate system r=f(φ) and φ=f(r), 46 mathematical functuions.
It work's fast and correct, has useful interface, easy to use and it developing in process - you can request features for me here. And it free =)
If you intrested - download it on:
Google play: https://play.google.com/store/apps/d...id=com.grapher
and Amazon App Store Amazon.com: Grapher: Appstore for Android