Hi Hamed,
It is currently not possible to run 3D Slicer on an IPad. For now, only devices running Linux or Windows operating systems are supported.
Regarding the cloud version, there is not yet turn-key solution readily available to run 3D Slicer on the cloud. Based on your specific needs, we could recommend possible approaches.
Here is an example from @lassoan running 3D Slicer on a windows tablet: