The iPhone’s auto correct feature comes in handy when typing certain words that contain apostrophes. When you need an apostrophe, instead of using the additional keyboard, you can type the final letter of the word an additional time and it will trigger the auto-correct feature to add an apostrophe where needed.

• Typing welll will correct to we’ll.
• Typing weree will correct to we’re.

There are some words that work slightly differently. For example, typing itsa will auto-correct to it’s.