iDousyn is a piano application for use on the platforms of iPhone, iPod Touch, iPad of Apple Inc. The application is available in two versions, one optimized for iPhone and iPod Touch, and another for exclusive use of the iPad.

iDousyn was initially released on March 1, 2011 by Jorge Lozada in the App Store. It was only available for the iPad at that time. The features have been added to the program over time, including the recording system. Updates after the release of iOS 9 have added other features, such as InterApp-Audio support (IAA), audio export to SoundCloud, MIDI Keyboard support.

iDousyn has a free version called iDousyn Lite that is available for use on Apple iPhone, iPod Touch, iPad platforms released on May 22, 2015.

On May 6, 2015 iDousyn was redesigned becoming version 2.0 with 500 sounds.

On March 13, 2017, support for InterApp-Audio and MIDI support is added.

On September 14, 2017 the audio export is added to SoundCloud, and AudioCopy.

iDousyn has 22.5k downloads.