Difference between bolt cloud api and bolt device api

is there any difference between bolt cloud api and bolt device api or is it the same thing that is can it be that bolt cloud api can communicate to many bolt device api linked to it?

The API key is linked with your cloud account. The device ID is linked with your device. You can have many devices linked to your account and communicate with all of them.The api key authenticates you with your account. And the device ID states which device you want to access

The BOLT cloud API is an interface for connections between the BOLT device and the other devices such as the mobile phone that we use for connecting to the internet. The cloud API basically controls the devices and helps us link data that we get from the device to the cloud and then to the user.
Hope this helps!