Android and iOS Safari default browsers do not support WebGL yet.
Neither Opera Mini nor Google Chrome Beta version for Android 4 do, but all of them have included it in their roadmaps. Here, for the Android devices, the Mozilla Firefox 4.0 browser have been employed for the tests.
Firefox has WebGL support and it can be installed from the Android Market.
Other browsers such as Opera Mobile 12.0 also support WebGL for Android devices.
But for the iOS devices, a specific application which runs a webkit based browser called GoWebGL18 provides WebGL capabilities.