DIY Workflow
If you don't want to use Expo Go or Expo CNG, you can use the "do it yourself" (DIY) workflow. This is one of the options when you spin up a new Ignite app.
tip
Implementation detail that you probably didn't need to know: it's still a "CNG" workflow under the hood, but we generate the native ios and android folders for you -- and then you never run CNG again. Instead, you customize those native projects directly yourself. Hence, "DIY".
Why would I want to use the DIY workflow?
We generally don't recommend it. It's mostly available for developers who are not interested in using Expo CNG / Prebuild and would rather maintain their own native code directly.