Rapster is a free iPhone application developed by Maroun Abi Ramia that allows you to record audio tracks while listening to music. With Rapster, you can record your voice along with any music playing from another app source.

The app works by capturing any sound that your device's microphone can pick up, seamlessly blending it with your track. You can easily change the song in the control center, allowing you to record over different music tracks. Additionally, Rapster supports the use of both Bluetooth and wired devices for recording.

One of the great features of Rapster is that there is no limit on the length of your track or the number of tracks you can create. You can easily organize your recordings into albums, making it convenient to manage your music projects. Once you're done recording, Rapster allows you to easily share your creations with others.

With its ability to record audio tracks while listening to music, Rapster provides a unique and convenient way for musicians and artists to create and share their work.