Link 1: Venn Diagram By International Reading Association

This app allows users to create Venn diagrams that contain two or three overlapping circles. Users identify and record concepts that can be placed in one of the circles or in the overlapping areas, allowing them to organize their information logically. The finished Venn diagram can be emailed out or saved to the device's photo album.

Users can pick from several circle colors, and both the circles and item font size can be altered to better align with the users' needs for each project.

Designed for use in the school environment, this app features a simple profile system so that multiple users can create their own Venn diagrams on the same device without confusion.

Link 2: Lekh Diagram By Rajeev Kumar

Lekh Diagram empowers you to express your idea on iPad and iPhone simply by sketching shapes with your finger.

Lekh Diagram can be used to make diagrams, flow chart, organizational chart, business process diagram, venn diagram, mind maps and any kind of illustrations.

Lekh Diagramís powerful and unique shape recognition engine can recognize various shapes and connections. Draw shapes and connections by dragging your finger on ipad and the Lekh Diagram will recognize drawing and will convert them magically into beautiful shapes.

In addition to basic shapes (which can be drawn by sketching), Lekh Diagram also provides a library of predefined shapes. Shapes from library can be easily added to canvas.

Once a shape is drawn, it can be modified and customized. Use standard pinch-zoom gesture to zoom shapes and standard rotate gesture to rotate shapes. The Lekh Diagramís unique vertex handle will allows you to precisely move vertices and control points of shapes...

Link 3: Grafio Lite - Diagrams & Ideas By Ten Touch Ltd

Become a better designer with Grafio! Your vector whiteboard ! Your canvas ! A tool for the person who thinks visually ! Make you concepts better, it's easy. Success happens when you start planning it!

-By drawing, sketching and dragging objects on the canvas. By connecting. By visualising your thoughts and then improving !

500 000 users worldwide are already using grafio to visualise their concepts. Making designs, flowcharts and even memes with it. Join them NOW! Take the free version for a spin...