Helio Workstation is described as 'Helio is a cross-platform lightweight music speed-painting tool. It features linear-based sequencer with clean UI, integrated version control to sync the projects between devices, export to midi and more' and is an app in the Audio & Music category. There are more than 10 alternatives to Helio Workstation for a variety of platforms, including Windows, Mac, iPad, Steam and Ableton Live. The best alternative is Waveform, which is free. Other great apps like Helio Workstation are Harmony Improvisator (Paid), Odesi (Paid), Cthulhu (Paid) and RapidComposer (Paid).
ChordMaps2 is a creative music app for iPad that allows you to play and explore melodies, bass lines, and chord progressions in both major and minor keys, most of the time tapping with just one or two fingers.
"ChordPolyPad" is a MIDI chords player that allows you to create chord sets from a large internal library, from any combination of notes, or from chords generated randomly. Each set consists of 8 groups of 16 pads, or 2 groups of 64 pads.