Found something interesting when i was searching a Voxel Editor for Smartphones. There is a Open Source Voxel Editor that supports different file outputs like MagicaVoxels & also Qubicle. It also have some great Features that i just know from Qubicle like unlimited Scene size & Layers.
They have an App for Windows / Mac / Android / iOS
Goxel
PC & Mac
Android
–> Go to the Play Store (8,99€)
iOS
Maybe someone find it useful