Ringtone Master is a free iPhone application developed by Huamei Xi. This app allows users to record audio, crop it, convert it, and export MP3 files. With Ringtone Master, users can easily set phone ringtones through Garageband.

One of the key features of Ringtone Master is its ability to import videos from the system photo library. This allows users to extract audio from videos and use it as a ringtone. Additionally, the app supports importing audio files in various formats, giving users the flexibility to work with different types of audio.

Another useful feature of Ringtone Master is its ability to trim audio files. This allows users to easily create custom ringtones by selecting the desired portion of the audio. The app also supports recording sound, allowing users to export audio files in the m4a format.

Overall, Ringtone Master is a versatile app that provides users with the tools to create and customize their own ringtones. Whether it's extracting audio from videos or recording sound, this app offers a range of features to meet the needs of users looking to personalize their iPhone ringtones.