V4.5 BETA was released in Apr 21, 2015. When stable version was released, CKEditor4 plugin will support it as soon as possible.
It seems the development of version 5 has been actively carried out in github. In V5, it seems all mobile devices may be supported. I hope to be also improved loading speed. When stable version of V5 was released, I will release new plugin as CKEditor5.
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