How to make a custom ringtone for your iPhone, with GarageBand on iOS -- 9to5Mac

With the latest version of iTunes, Apple buried the interface for making ringtones on the Mac. It's still possible but a lot more cumbersome to manage. A little-known secret is that you can actually make custom alert ringtones for iOS on your iPhone itself, using GarageBand. Here's how. ....
https://9to5mac.com/2017/11/10/iphone-ipad-custom-ringtones-make-ringtone-garageband/