iRinger is a free utility of creation of ringer tone for Iphone. The ringer tone can come from any sound sources and videos: ogg, mp3, wma, ram, m4r, etc. "Jailbreaker" of the iphone is not necessary. In effect, the converted files are directly transferred towards Itunes La creation of rings is therefore made in a quick manner. He also allows to apply filters to rings and to augment or to diminish the volume.
