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This is an AUv3 compatible stereo Analog Phaser plugin which can be used as a plugin with your favourite DAW such as Cubasis, Auria, Meteor or GarageBand.

New version 1.03
Old version 1.02
Release Notes Fixed an issue with automation
Author 4Pockets.com
Type Effect
Effect type Chorus, Flanger, Phaser etc.
Supports Audio Unit (AU)

Scythe for iPhone brings the powerful synthesis engine of Scythe to the iPhone.

New price $2.99
Old price $3.99
Author Bitmask Studio Ltd.
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audiobus

This is a AUv3 compatible digital delay which can be used as plugin with your favourite DAW such as Cubasis, Meteor, Auria or GarageBand.

New version 1.03
Old version 1.02
Release Notes Fixed an issue with parameter automation under Cubasis
Author 4Pockets.com
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)

Open up new worlds of creative music making possibilities with Audiobus, the app that lets you use your music apps together, just like virtual cables.

New version 3.2.5
Old version 3.2.4
Release Notes Improvements to background app management
Author Audiobus Pty Ltd
Type Tool
Supports Audiobus

GridInstrument lets you play your iOS device like a musical instrument. Instead of a piano keyboard, notes are arranged on a grid.

New price $3.99
Old price $9.99
Author Decidedly, LLC
Type Controller
Supports Audiobus

Shoom is an expressive XY pad synthesizer. Or, more precisely, three identical synthesizers in one app.

New price $7.99
Old price $9.99
Author Yuri Turov
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audiobus

Shoom is an expressive XY pad synthesizer. Or, more precisely, three identical synthesizers in one app.

New version 1.1
Old version 1.0
Release Notes • Optional 'Equal Spacing' pad pitch layout (the only previously available option is now called 'Logarithmic') • MIDI CC takeover modes (Pickup, Value Scaling) • Control over currently selected synth with MIDI CC (in addition to previously available 'hardwired' Synth 1/2/3 mappings) • Added separate 'Select Synth 1/2/3' actions for MIDI CC • Audiobus 3 support (including AB MIDI) • Ableton Link support • Moved Sync settings to a separate menu inside Global Settings • Synth engine optimizations • Added 64-sample buffer size option • Added new presets by Guido Flichman • Fixed a bug where the sound could be suddenly muted in rare cases • Fixed a bug where presets with names containing diacritics wouldn't be saved • Fixed a bug where current CC map wouldn't be loaded on startup in some cases • Fixed UI not being properly updated when changing current synth via MIDI CC • Fixed Voice Stealing setting not being saved and loaded with the session • Various other improvements and bug fixes
Author Yuri Turov
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audiobus

Scythe is a synthesis engine. The controls have been minimised to allow a simple workflow with the same complex modulation that you might be used to.

New price $5.99
Old price $7.99
Author Sonic Sector Ltd
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audiobus

Final Touch is a professional audio post production system for iPad.

New price $9.99
Old price $19.99
Author Positive Grid Inc
Type Effect
Effect type All-in-one
Supports Inter-App Audio (IAA), Audiobus

StompBox turns your iPad into a flexible Multi FX Processor, it  includes many effects plus a Recorder and Media Player.

New price $9.99
Old price $14.99
Author 4Pockets.com
Type Effect
Effect type Guitar effects, Bass effects, All-in-one
Supports Inter-App Audio (IAA), Audiobus

Poison-202 is a professional Vintage Midi Synthesizer.

New version 2.4.4
Old version 2.4.3
Release Notes - fixed bug when the first note was rendered silent when using "Freeze audio" function in Cubasis and Garage Band apps with Poison-202 Audio Unit.
Author Dmitrij Pavlov
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)

Castamatic is the app to listen to podcasts on any iOS device.

New version 4.5.4
Old version 4.5.3
Release Notes Version 4.5.4 - Improved complications for new watches - Improved transport UI - Improved iCloud sync speed Version 4.5.3 - Fix for Siri shortcuts bug Version 4.5.2 - Fixed: Castamatic did download artwork disregarding podcast settings - Current chapter's duration and remaining time in chapter list - Minor bug fixes Version 4.5.1 - Improved UI for new watch models - Added pause voice shortcut for Siri Version 4.5 - Support for Siri shortcuts - New watchOS player UI with volume control - Renewed player UI Version 4.0 - New Auto-leveler effect, with machine learning assisted voice/music detector and dynamic range optimizer. - Improved sync: both contents and sort order of the OnTheGo playlist are synced between devices and restored when app is reinstalled. - Improved UI better integrated with iOS 11 look and feel - Multiple item drag’n drop - Improved speed and stability - Improved dark theme - Improved podcast chapter support
Author Gunp Media Productions
Type Instrument
Instrument type Sampler
Instrument sounds Other
Supports Audio Unit (AU)

Riffer is a creative MIDI sequencer that generates random patterns and melodies for you. Designed to feed any Synth, Sampler, Drum Machine and anything that accepts MIDI signal both software and hardware.

New version 1.0.3
Old version 1.0.1
Release Notes - Minor UI improvements & bug fixes
Author AUDIOMODERN
Type Tool
Supports Ableton Link

Borderlands Granular uses a technique called granular synthesis, which involves the superposition of tiny fragments of sound, or “grains," to create complex, evolving timbres and textures.

New price $5.99
Old price $11.99
Author Chris Carlson
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audiobus

BIAS is a professional amp designer, modeler and processor.

New version 2.1.4
Old version 2.1.3
Release Notes Hi there, This latest update brings you: - BIAS FX iPhone integration! - Fixed BIAS AMP 2 from crashing when performing hardware serial number checkup - Minor bug fixes and general performance improvements Rock on! The Positive Grid Team
Author Positive Grid Inc
Type Effect
Effect type Distortion, Drive etc., Guitar effects
Supports Inter-App Audio (IAA), Audiobus

A complete Middle Eastern percussion ensemble in your hands including more than 300 Rhythms from Egypt, Morocco, Iran, Persia, Iran, Turkey, Greece...

New version 1.14
Old version 1.13
Release Notes - New Features for iBassist - Midi "Send Notes" Button
Author Lumbeat
Type Instrument
Instrument type Sampler
Instrument sounds Drums, Percussion, Ethnic
Supports Inter-App Audio (IAA), Ableton Link

BIAS is an Amp Designer, Modeler and Processor.

New version 2.1.4
Old version 2.1.3
Release Notes Hi there, This latest update brings you: - BIAS FX iPhone integration! - Fixed BIAS AMP 2 from crashing when performing hardware serial number checkup - Minor bug fixes and general performance improvements Rock on! The Positive Grid Team
Author Positive Grid Inc
Type Effect
Effect type Compressor, Limiter, Gate, Distortion, Drive etc., Guitar effects, Bass effects, Other
Supports Inter-App Audio (IAA), Audiobus

With Skwitch Music it’s easy to compose your own riffs, melodies and chord progressions.

New version 1.0.4
Old version 1.0.3
Release Notes Fixed a bug that was causing the app to crash when attempting to load a riff with zero notes in it - the app will also now ask if you want to keep or delete riffs with zero notes. Added a fix for iPhone 5s users that will prevent crashes that were caused by a difference in the sensing and processing capabilities of this device. iPhone 5s users should now be able to attach and use Skwitch successfully, but some of the more advanced motion detection/calibration features are currently not working as expected on iPhone 5s and users will need to be careful to keep the device still after the initial calibration has completed. Depending on usage conditions, iPhone 5s users may also need to re-calibrate more frequently than users of later iPhone models. Guidance screen added to iPhone version of app running in legacy mode on iPad to alert users that the App will not run on iPad - should be installed on iPhone only. Added Jingle Bells riff.
Author Playable Tech ltd.
Type Instrument
Instrument type Sampler
Instrument sounds Guitar
Supports Audiobus

Turn your microphone into 15 different studio microphones.  A portable studio, use your device as a microphone to record or import audio.

New price $14.99
Old price $19.99
Author Future Moments
Type Effect
Effect type Other
Supports Inter-App Audio (IAA), Audiobus

This is an AUv3 compatible stereo reverb which can be used as a plugin with your favourite DAW such as Cubasis, Meteor, GarageBand or Auria.

New version 1.02
Old version 1.1
Release Notes Fixed an issue with control automation.
Author 4Pockets.com
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)