Customers with a Netflix Premium account are allowed to watch on up to 4 supported devices in 4K UHD and Netflix Spatial Audio. In addition, Netflix Premium subscribers are also allowed to download shows to watch offline on 6 devices at a time.
Netflix Standard account customers are allowed to watch shows in Full HD and download them to watch offline on up to 2 supported devices at a time.
On the other hand, Netflix Basic account customers are allowed to watch shows in HD and download shows for offline viewing on only 1 supported device at a time.