There is a device limitation for your Krisp account. Here is what it means and how it works.
If you have a Krisp Pro account you can use Krisp app on up to 3 devices at the same time.
The 3 device limit is intended to ensure that Krisp is not abused for non-personal use and thus imposes restrictions on simultaneous use of the product on multiple devices. The limitation is not connected to the specific device, it does not install any license keys that you have to transfer from device to device. You shouldn't worry that you will lose a license for a device, when logging in on a new one surpassing the limitation.
Krisp's 3 device limitation is not connected to the specific device
Once you log in to the 4th device, you will be automatically logged out from the first device you logged in. This is quick and easy cloud management procedure and you do not need to worry about managing licenses per device.
You cannot be simultaneously logged into your Pro account on more than 3 devices
To use Krisp on a given device all you need to do is to log in on it with your Krisp account. You can log in on as many devices as you want, but you will be able to use Krisp on only the last 3 devices you logged in with your Krisp Pro account.
As for the Free plan accounts, there is a one device limitation. This means that you will be logged out from your free account on the device you use it once you log into it on a different device.