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Part of the fun of the colAR experience is being able to show off your artwork, but in a large class it may be difficult to
get everyone around the iPad.
If you are using an iOS device and have a Mac or PC which is connected to a projector, you can use a program called Reflectorto transmit what’s happening on the iPad onto the computer, and therefore onto the projector.
I hope this is useful in your class.
Please check whether you enabled In-App-Purchase in iPad setting restrictions section.
Here I found an article about How to enable iPad restrictions shows screenshots of where iPad restriction settings are.
Try leaving the background without color. This might help the camera recognize the page.
iOS, you maybe running too many Apps in the background. Please see the following link on how to turns Apps off in the background.
This happens when:
The image quality depends on the quality of your camera. Ensure that you have good lighting too. The best angle is from the top down with as little distortion as possible. We also suggest coloring with bright colors!
Most pens, markers and crayons etc…WORK with ColAR. However, it is important that you do not draw over the lines with anything dark.
colAR works on most iOS devices that have a backwards facing camera: iPhone 4, iPhone 4S, iPhone 5 iPad2 & iPad3. ColAR requires iOS 3.1.3 or later and is optimized for iPhone 5
colAR works on most of android devices that have a backwards facing camera and android 2.2 and up