To get analytics of age, gender, and devices, we can leverage off-chain data sources. This includes collecting data from social media platforms such as Facebook and Twitter, as well as from other sources such as surveys, polls, and questionnaires. We can also use web analytics tools such as Google Analytics to track user behaviour on our website and gain insights into the age, gender, and devices used by our audience. Additionally, we can use third-party data providers to access demographic and device data. This data can be used to gain insights into the age, gender, and devices used by our target audience and help us to create more effective marketing strategies.