Dynamic geometry system for Android which optimizes interactive Geometry, Algebra, Statistics and Analysis for the touchpad and contains hundreds of powerful features. Free Geo won the german price "Preis des Bundespräsidenten Jugend forscht 2013".

Create geometric constructions and move, scale or rotate them with one or more fingers.
With the Freehandmode you can additional build your lines, circles, squares, rectangles and many more by drawing them on the screen. The system will detect it and create the object for you! For example, you can draw a freehand circle through three given points to create their circum circle.
Furthermore, you can create even complicated mathematical projects by using one of 70 tools to add different points, circles, lines (Perpendicular bisectors, Orthogonal lines, Tangents, etc.), conics, angles, functions and many more.

Define functions and parameter curves to display, integrate or derive them. Create analytical objects like tangents and circles of curvatures or combine your creation with sliders, text and check boxes. Even exact calculations are possible with the own FreeGeo Computer-Algebra-System, for example solving equations.

FreeGeo can be used in other sciences, too. You can do statistical calculations by using one of the regression methods to interpolate given data points. And it is a nice app for learning for school!

A PDF manual of FreeGeo can be found here: http://www.freegeo.de/

适用于Android的动态几何系统，可优化触摸板的交互式几何，代数，统计和分析，并包含数百种强大功能。 Free Geo赢得了德国的价格“PreisdesBundespräsidentenJugendforscht 2013”​​。

创建几何结构并使用一个或多个手指移动，缩放或旋转它们。
使用Freehandmode，您可以通过在屏幕上绘制它们来额外构建线条，圆形，正方形，矩形等等。系统将检测它并为您创建对象！例如，您可以通过三个给定点绘制一个手绘圆，以创建它们的圆周。
此外，您可以使用70个工具中的一个来添加不同的点，圆，线（垂直平分线，正交线，切线等），圆锥曲线，角度，函数等等，从而创建复杂的数学项目。

定义函数和参数曲线以显示，集成或派生它们。创建分析对象，如切线和曲率圆，或将创建与滑块，文本和复选框组合。甚至可以使用自己的FreeGeo计算机 - 代数系统进行精确计算，例如求解方程式。

FreeGeo也可用于其他科学。您可以使用其中一种回归方法对给定的数据点进行插值来进行统计计算。这是一个学习上学的好应用程序！

可以在此处找到FreeGeo的PDF手册：http：//www.freegeo.de/