Hi @Evil_Fischi ,
I haven tried it yet in a VR mobile device, sorry! I think it should work, as it’s a common blueprint, however, maybe the mobile app crashes because of the kind of material using on the UE4 Backdrop dome, in which case, mine could crash too, as it uses a similar material (unlit, in a part). I think the UE Backdrop may be crashing because it requires to have the plugin installed, etc, and my tool doesn’t need any plugin, but I don’t know if the cause of your crash may be another one, affecting my tool too. Sorry for not being more helpful, as I can’t test it in any mobile device.
Thank you for your interest and best regards!