Ringdroid - Ringtone editor

Ringdroid is a simple, open-source ringtone maker that lets you create custom ringtones, alarms, and notification sounds from audio files stored on your device. It works completely offline and keeps all your files local on your phone.

Features

• Create ringtones, alarms, and notification sounds
• Cut and trim audio using an easy waveform editor
• Zoom in to select the exact part of the audio
• Record audio and turn it into a ringtone
• Preview audio before saving
• Assign ringtones to specific contacts
• Supports common audio formats like MP3, WAV, AAC, OGG, AMR

The source code is publicly available and can be reviewed here:
https://github.com/althafvly/ringdroid