Some time ago I mentioned a tool allowing you to tweak OpenGL ES shaders on an iOS device.
Here’s a similar tool from Götz Rößner that provides a number of nice features for creating and tweaking your OpenGL ES Shaders that has added compatibility for OpenGL ES 3.0 called Shaderific.
Shaderific allows you to view the results of your shader tweaking immediately with full help, code completion, with a number of built in shader examples, and objects to test your shaders on with easy Dropbox and iTunes file sharing capability and more.
You can find Shaderific on the App Store here.
Götz also submitted a quick tutorial explaining how you can update your OpenGL ES 2.0 shaders to OpenGL ES 3.0 that can be found on the Shaderific site here.
A very nice tool for developing OpenGL ES Shaders.
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