Last but not least, we are going to see the license checking feature in action.
The Nucleus service provides you with a minimalistic license checking mechanism that you can use with your Electron applications.
If you are looking for more sophisticated solutions, please check out the Keygen (https://keygen.sh/) service, a "dead-simple software licensing API built for developers."
The Nucleus service allows you to manage a list of licenses in the Other / License Policies section of your online account and then let the client application check their status.
Based on this check, you can either enable or disable certain features or notify users that the license has expired. You can even provide an in-app way to buy a new one or upgrade to a different tier if your application supports that.