YouTuber Jean Rochat got his hands on a beta version of Group The Loop which adds iPhone support. Here he runs his sax into the looper with Audiobus.
New track CIRRUS - sax looping with GroupTheLoop iOS app (here on iPhone beta version, already available on iPad). 100 % made on iPhone 7 Plus, using various apps including GTL and Audiobus. Instrumental loops are triggered live, all saxes loops and sax solos are played live and recorded/performed in one pass in GroupTheLoop with a pedalboard. No post production except for Lurssen Mastering Console on the GTL stereo file performance recording.