XENON is described as 'Groove Synthesizer is a music making app with polyphonic hybrid synthesizer, 2 VA monophonic synthesizers, polyphonic PCM synthesizer, rhythm machine, sequencer, mixer and also includes over 350 preset sounds' and is a Music Production App in the Audio & Music category. There are more than 10 alternatives to XENON for a variety of platforms, including iPad, iPhone, Android, Android Tablet and Mac. The best alternative is FL Studio. It's not free, so if you're looking for a free alternative, you could try SunVox or Caustic. Other great apps like XENON are MuLab (Paid), Cubasis (Paid), G-Stomper Studio (Paid) and Auria (Paid).
NanoStudio is a recording studio for iOS, OS X and Windows. It has virtual analogue synths, sample trigger pads, a comprehensive sequencer, a sample editor, a mixer and multiple effects all integrated into a single application.
bleep!BOX is a drum machine, synthesizer and sequencer for your iPhone, iPad and iPod Touch. bleep!BOX has NO SAMPLES - every sound is generated in realtime, so you can tweak to your hearts' content and kiss repetitive, cookie cutter drum beats and loops goodbye. bleep!
uFXloops is an Android App which simplifies music production and playback of your creations. It is focused on an easy-to-learn, easy-to use approach, still letting you decide about how complex your music production is going to be.
n-Track Studio is an audio and MIDI multitrack recorder that turns your device into a full-fledged recording studio. Record and playback a virtually unlimited number of tracks, mix them during playback and add effects. Create MIDI tracks using the built-in General MIDI synth.
Turn your phone or tablet into a musical instrument! RD4 - Groovebox is a music making app with virtual analog synthesizers, drum machines and effects. Compose and arrange your music in real-time. Choose instruments individually for the 4 channels.