Doppi is built independently, but its quality is enabled by the Doppi Beta Testers. If you'd like to contribute some of your time to Doppi, apply to become a Beta Tester.

Original French localization generously provided by Mentea.

Open Source

Parts of Doppi are made possible by the generous creators of and contributors to the following open source projects:

MarqueeLabel

For auto-scrolling long song titles in the player.
MIT license

TagLib

For reading and writing metadata on your song files.
LGPL license

SDWebImage

For caching artwork so that scrolling is fast.
MIT license

Keychain Swift

For storing your Last.fm session key securely.
MIT license

GCDWebServer

For powering the Doppi Web Uploader.
New BSD license

Newer parts of Doppi have been written by Claude by Anthropic. OpenAI and Google models have also been used. AI models are trained on countless open source projects.

Lastly, thanks to the people at Apple who make the system software and marketplace that enables Doppi, as well as to the 2001–2006 iPod+iTunes teams.