As of November 2015, some highly rated ringtone makers are Ringtone Maker, Ringtone Designer and Ringdroid. Both Ringtone Maker and Ringtone Designer are available for iOS, while Ringdroid is available for Android.
Ringtone Maker lets people use their own sound files in MP3 or M4A format to create ringtones, and it supports fade in and fade out effects. They can also record sound and create ringtones from those recorded audio files. Ringtone Designer lets people create unlimited number of ringtones and adjust the length of these ringtones. Ringdroid is an open-source app that allows people to make ringtones using their existing audio files or record sound with their Android phones.