After installing Brave on your Android device, you can tap the main menu then Settings and select the Set as Default browser option:

To set Brave as your default browsing app on iOS:

1. Visit your iOS system Settings.
2. Scroll to the bottom and find Apps.

1. Click on Default Apps at the top.

1. Next, select Browser App.

Choose Brave and you're all set! Your device will now use Brave as it's default browser.