To create an iOS and Android chart with data visualizations using React Native and Victory Native, you need to have a basic understanding of JavaScript and familiarity with ReactJS. You also need a running instance of InfluxDB to store time series data. The tutorial will guide you through installing Expo CLI, creating a new project, setting up the InfluxDB client library, and deploying your app to the web. It covers basic chart components such as VictoryBar and VictoryLine, useful props like data, x, y, style, and more. The example code uses InfluxDB to query air sensor data from the last 30 minutes, transforms the results, and passes them to a Victory chart component for visualization. The tutorial concludes with tips on cleaning up the project and resources for further learning.