A voxels (cubes) editor
The app for making an art of colored cubes.
Export to Polygon File Format:
Menu -> Models -> Export
File writes to folder: Android\data\com.Stenson.Art_o_cubes\files\Export\*.ply
The models has the vertex colors. To see the colors after import in Blender turn on the Textured Solid inside the Shading tab of N-panel.