You need to be at least 18 years old to create a DriveScore account. You'll need to download the app from the Apple Store or Google Play Store. If you've already got a ClearScore account, you can use the same details to sign up to DriveScore.
If you don't have a ClearScore account, you can still use DriveScore. You'll just need to enter your email address, full name and date of birth to sign up.