iOS 15 lets you change the size of text on screen in each app — here's how

Text too small or too big in your favorite app? Try changing the size with Text Size in iOS 15.

Being able to read all the text on your iPhone or iPad comfortably is important, but some apps have text that is too small, while some apps have text that may seem too big. iOS 15 and iPadOS 15 has a new function you can add to your Control Center to adjust the text size in each individual app. It's called Text Size.

Browsing Twitter but wish the text was bigger and easier to read? Text Size can help. Wish the text was a litter small in Messages so you could see more of the conversation at once? Text Size can help. Your great iPhone can become even better when you customize it to your liking. Here's how to set per-app text size on iPhone and iPad.

Apple occasionally offers updates to iOS, iPadOS, watchOS, tvOS, and macOS as closed developer previews or public betas. While the betas contain new features, they also contain pre-release bugs that can prevent the normal use of your iPhone, iPad, Apple Watch, Apple TV, or Mac, and are not intended for everyday use on a primary device. That's why we strongly recommend staying away from developer previews unless you need them for software development, and using the public betas with caution. If you depend on your devices, wait for the final release.

How to set per-app text size on iPhone and iPad:

• How to add Text Size to your Control Center
• How to change the Text Size in an app

How to add Text Size to your Control Center on iPhone and iPad

Before you can start adjusting the size of the text in your apps, you need to add the Text Size function to your Control Center — here's how.

1. Launch Settings from your Home screen.
2. Tap Control Center.

3. Tap + button next to Text Size from the list of functions. You'll likely have to scroll down the page to see it.

   

Now the Text Size function is added to your Control Center, and you can start changing the size of your text in almost any app.

How to change the Text Size in an app on iPhone and iPad

Changing the text size with the Text Size function works in many different apps, but some third-party apps don't seem to have the ability to take advantage of those new features yet. So test it out in a bunch of different apps to see what works!

1. Launch the App you want. I'm using Twitter for my example.
2. Open Control Center. Swiping down from the top right corner or swiping up from the bottom of the screen, depending on your iPhone model.

3. Tap Text Size icon. It's the one with two "A's."

   

4. Tap the app-only button. It's the button on the left.

5. Tap the text size you want.

   

The default text is 100%, but you can make it as small as 80% normal size or as large as 310%.