There are a few ways to create a censored effect on an iPhone:
1. Use an app: There are a few apps available that can help you create a censored effect. Censor It! is one option.
2. Use editing software: If you have access to editing software like Photoshop, you can use the Clone Stamp tool to cover up any areas you want to censor.
3. Use a sticker: You can also use a sticker or piece of tape to cover up the area you want to censor.