I'm trying to import a 3D Model I created with an Android app (SubDiv Former), thing is that the model looks great in the app but when importing the file to Blender looks "Blocky" of "Pixelated" (I'm new to 3D modeling so I don't know the right terminology) anyways, my question is, How can I fix this rendering problem so the model looks exactly the way it looks in the app?
Thanks in advance
Picture of model in Android App (SubDiv Former)


Picture of model in Blender


Any tips or help I would appreciate.