Personalizing your iPhone notification sounds is one of the best ways to make your device truly yours. While Apple provides a standard library of alerts, many users prefer to to distinguish between different apps or contacts.
Unlike Android, iOS requires a specific process to turn a downloaded file into an alert tone. The most popular method is using the app (available for free on the App Store). Step-by-Step with GarageBand (No Computer Required)
Ultimate Guide to iPhone Notification Sounds Download and Customization

