While custom ringtes can be created the Mac versi of GarageBand and exported to the iPhone, the producti of a custom sound can also be performed from iOS. AppleInsider shows how to turn GarageBand recordings into a ringte using an iPhone or iPad, without using a Mac.
Creating a ringte from the iOS device itself is easier in some ways compared to doing the same thing via GarageBand for Mac. Although the music creati or creative creati element is slightly different, since it is iOS-based instead of macOS with different recording optis, the overall process is quite similar to the Mac versi.
The main difference is the export of the ringte and implement it the iPhone or the iPad. When the Mac asks users to find the file and import it into iTunes to apply to their devices, the export as a ringte is more direct when running the procedure the smartphe or the tablet itself.