Here's how to delete individual messages and conversations on your iPhone's Messages app, with steps to set up an auto-delete ...

If you want to recover a text message, tap on the thread or message so that it's selected, hit Recover on the bottom right, and then tap Recover Message in the pop-up that appears. You can also ...

You can swipe to delete messages in the iPhone's Mail app, but you'll need to enable this option in Settings.