* EASY TO ZOOM GRAPHS OF FUNCTIONS
Use pinch zoom (two-finger zoom) to zoom graphs on multitouch devices. On older devices you can use one-finger zoom. Just long press the graphs to enter the zoom mode. Then just drag left/right/up/down to zoom. The scale grid is automatically updated. To select the interesting parts of the graphs has never been easier! With Graphoid calculator you can focus on inspecting graphs of functions, not how to use menus.
* ZOOMABLE VALUE TABLE OF FUNCTIONS
The functions can be investigated by a value table as well. By dragging the table up/down you move the visible interval of the function. You can even zoom the table values with pinch zoom on multitouch devices or by using the zoom buttons on the screen on non-multitouch devices. The differences between the x-values are auto calculated to be human readable. Rotate the device to portrait format and compare two functions in the table. Of course you can calculate min, max, intersections etc right from the table screen. To inspect functions with a value table is faster, easier and more intuitive than ever with Graphoid!
* SYNTAX HIGHLIGHTING INCREASES READABILITY
When you enter expressions or functions they are displayed with colored text; the negative sign has a different color than the subtraction sign, the scientific notation 'E' is highlighted by color so you don't miss it (we all have received answers like 1.394735386937635E9 without notice the 'E'). During the input of an expression matching parentheses are highlighted with color to make multi parentheses input more readable.
* EASY HUMAN READABLE ERROR MESSAGES
In case you enter an illegal expression you will get an easy-to-read error message. Also, if a calculation error occur a specific human-friendly error message will tell you what went wrong; 'Division by zero', 'Log of a negative number is illegal' etc. Graphoid is made to help us avoid mistakes!
* STORED VARIABLES AND EXPRESSIONS
You can easily store variables with an arbitrary name and use them in future calculations. The last entered expressions are automatically stored and can be reused or edited.
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