Loopy is described as ', the sophisticated, tactile live looper app that reinvents iPhone and iPad music making. Layer up to 12 loops with overdub, stereo, count-in, variable tempo, import/export, and full MIDI clock and control support' and is an app in the Audio & Music category. There are more than 10 alternatives to Loopy for a variety of platforms, including iPad, Mac, Android, iPhone and Windows. The best alternative is Spire, which is free. Other great apps like Loopy are Mobius (Free), Repetito (Paid), LoopRecorder (VST/AU plugin, Standalone) (Paid) and VoiceJam (Paid).
Mobius is live looping open source software for the real-time creation of audio loops, with an old fashioned (win 3.1 style) GUI, MIDI and PC-keyboard control, and a powerful scripting language to customize and control all aspects of the software externally.
LoopRecorder is a Live Looper, an almost click-less Recorder (wav) and a loop Player (wav, flac, aiff, mp3, ogg). Insert it as a 32/64bit plugin (VST or AU), place the cursor where you want to record and press play in your host.
New Musical Instrument - Fast self sampling music creation and MIDI controller by Jordan Rudess. Can be used for live looping, creating and saving loops, for performing with Rap and Dance like style music, or as an advanced type of sampler.
ALK is a DAW that combines a sequencer and looper into a live tool that's as advanced as a traditional sequencer, letting you draw, move, copy and paste musical arrangements as well as layering live sounds.
WoodStepper is a sequencer/sampler having both audio and midi out. The audio input sources can be the track audio, sampled audio or the built-in VCO. It consists of 4 independent 8-steps sequencers which can be linked to a 16, 24 or 32 steps sequencer.