Automatic: The machine takes care of everything. It automatically turns the eggs at predetermined intervals, without any intervention from you. An ideal choice for maximum convenience and high success rates.
Semi-automatic: The rotation is done manually but in bulk, usually by pulling an external lever or turning a key. All the eggs are turned together at the same time, without needing to open the machine’s lid and lose heat.
Manual: You need to open the machine and turn the eggs one by one by hand, usually 2-3 times a day.