There are many free ringtone apps available on the App Store. These apps allow you to browse and download a variety of ringtones directly to your iPhone.
To set your new ringtone, go to "Settings" on your iPhone, then select "Sounds & Vibrations." Then choose "Ringtone" and find the ringtone you downloaded. Tap it to set it as the default ringtone or for a specific contact.
The quality of free ringtones may vary depending on the source. However, many ringtone apps offer high-quality ringtones that sound great on your iPhone.
Most ringtones downloaded from iTunes or third-party ringtone apps are designed specifically for iPhones. However, some applications may offer versions compatible with other smartphones.