SweetHome3DJS works the same on desktop and on iOS, so if it doesn't work on iOS, it's probably that your iPhone can't handle some 3D models or some too large texture images. I would suggest to try first without roof images (just remove the PNG in the folders 14 and 43 of your SH3D file), then if there are still problems, without the roof because it's made of (too) many little objects.
By the way, nice project!
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Emmanuel Puybaret, Sweet Home 3D creator
