Polychord is drums, bass, chords, and accompaniment all in one App.

Simply press one of the chord circles and your on you're way to writing a song even without much training with chord relationships and polychords. Drums and bass follow the chords automatically, but the coolest part is probably the strum keys on the right: simply swipe your finger over the yellow keys (or chrome keys in version 2) to strum a chord.

Turn on MIDI for any of the instruments in polychord, and use it as a powerful controller for your favorite audio programs.

See Polychord in action:

New in v2.9.1

• Updated for iOS 7 AudioBus compatibility
• Fixed crash when opening songs panel

New in v2.69

• Bug fixed with hanging MIDI notes

New in v2.68

• Playing chords with other virtual MIDI apps has improved
• Uses less CPU (more efficient, better performance)
• Uses less battery
• "Touch Pressure" now OFF by default (turn on in chord / strum settings)
• True 'polychords' now possible through MIDI (play many chords on top of each other.)

New in v2.67

• Volume Boost has made everything louder.
• Sound Engine Off MIDI mode is 20% more efficient.

New in v2.65

• Added dynamics control by pressing softer or harder on the chords and keys which can be toggled on or off by the 'Touch Pressure' switch
• Added "Pressure Gain", a control that allows users to adjust the polychord app's touch sensitivity.

New in v2.05

• This is a bug fix release to correct a number of minor problems.

New in v2.0

• record and share songs with SoundCloud
• sleek new UI made in collaboration with Jonas Eriksson
• palettes, so you can save your settings
• palette f-keys, for fast switching between palettes
• Sine, Sawtooth, Triangle and Square Waves for each instrument. (We used an 'analogue simulation' technique for generating the synthesizer waves, which warms them up a bit.)
• Bitshift features for drums: full control over the reduction of bits / bitrate, allowing you to completely decimate the sound or just add a touch of noise.
• Basic low-pass filtering, resonance for each instrument
• Tremolo Depth controls
• Scale mode for the strum keys: rather than the strum keys playing the notes of the current chord, you can set them to numerous other scales.
• Arpeggiator based on time-signatures. Full control over the speed and count of the arpeggiator -- allows you to mix a different time signature over the beat. Arpeggiator now has all of the same synth controls as the other instruments.
• The UI now highlights the last chord you pressed, rather than always highlighting the root-note.
• Octave control for every instrument
• Precise BPM control, with text input
• A global on/off switch for Auto Accompany
• File manager for renaming/deleting/loading palettes, songs, etc
• pitch bending on strum keys (sends out MIDI too)
• skins panel lets you switch back to the classic color scheme