I noticed yesterday that a new version of Chordec appeared on iTunes, and the old one disappeared. I contacted developer Weibin Shen to figure out what is going on with this powerful and free chord recognition app. He's turning the project over to his friend Xiao Yixiang and his company, EUMLab which makes several related apps like DAW Remote and Pro Tuner. EUMLab will now maintain the app, and at present it is still free!
Weibin wants to make sure everyone deletes the old one and moves over to the new app so that you will get future updates.
Chordec iTunes Description:
Chordec does chord recognition for songs from your iOS device. Its algorithm has the highest accuracy among published algorithms till at least the end of 2012.
Chord recognition accuracy under default "chordec sensitivity":
• 80% if counting only major and minor chords,
• 65% if counting only maj, min, aug, dim, 7, maj7 and min7
Load a song from your iOS device, and chordec solves the chord for you. You can then learn the chord using the speed-variable playback. Can't figure out how to rewind or fast forward? Move the cursor or scroll/zoom the tape to navigate to anywhere in the song.
Here is a video from Weibin announcing the switch-over.