This depends on whether you purchase our Minecraft or Roblox packages. You will need Minecraft Java edition to test the mods you code with Coolmath Coding. You can purchase Minecraft from their official website. We support the main Java version of Minecraft, available on PC & Mac. Roblox and its coding tool, Roblox Studio are completely free to download. There are no hidden charges for using these products. Roblox offers a paid premium service, but you won’t need this for learning to code.