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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 Free
Old price $1.99
Author Sonic Sector Ltd
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audiobus

This is the free iPhone version of Hook. Hook is a new music performance, mashup, and DJ app for iPhone and iPad.

New price $0.99
Old price $2.99
Author Retronyms Inc
Type Host
Supports Inter-App Audio (IAA)

APHELIAN features a new kind of sequencer, based on a geometrical metaphor. The interface is composed of 4 independent instruments, distributed in the corners.

New price $7.99
Old price $11.99
Author Juan Maria Bordon
Type Instrument, Controller
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audiobus, Ableton Link

Harmonic Exciter is an AUv3 Compatible plugin for your favourite DAW such as Cubasis, Auria, AUM, Meteor, BM3 or GarageBand etc.

New price $4.99
Old price $6.99
Author 4Pockets.com
Type Effect
Effect type Other
Supports Audio Unit (AU)

Hook is a new music performance, mashup, and DJ app for iPhone and iPad.

New price $1.99
Old price $4.99
Author Retronyms Inc
Type Instrument
Instrument type Sampler
Instrument sounds DJ
Supports Inter-App Audio (IAA)

Hammond B-3X is a next-level tonewheel organ app.  We’ve partnered with the Hammond Organ Company and Suzuki Musical Instruments to create the most immersive, authentic and powerful B-3 experience for use live on stage or as a plug-in inside recording apps.

Author IK Multimedia US, LLC
Type Instrument
Instrument type Sampler, Synth
Instrument sounds Keyboards
Supports Audio Unit (AU)

ChordUp is a chord musical instrument and MIDI controller with a unique fast-access chord selector.

New version 1.4.1
Old version 1.4
Release Notes - Update app icon - Fix "rate app" dialog
Author Dmitrii Klochkov
Type Controller
Supports Audiobus

Tune Maker is a music composition tool which helps you to understand the basic components of music and to quickly begin creating your own compositions.

New version 1.1
Old version 1.0.2
Release Notes - Added Audio Unit full-state saving support. - Add a button to open Audio Unit Extension interface from the mixer main view. - Autoscroll to the selected instrument in track instrument table. - Don't auto-return to main mixer view after selecting an instrument. - Fixed the bug when the octave transposition setting would be displayed incorrectly and does not affect notes played when editing note events. - Fixed the bug when the current chord selection is lost on an Undo operation. - Don't allow to move chord events outside the section's boundaries when moving and resizing. - Fixed the issue when Notes are recorded but not played for arpeggio track when playing using an external MIDI keyboard. - Added link to Community Chat in settings.
Author Dmitrii Klochkov
Type Host
Supports Audio Unit (AU)

Mela is an intuitive virtual analog synthesizer with a streamlined interface.

Author Nikolozi Pty Ltd
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audio Unit (AU)

This is a very simple yet powerful iOS app that performs as a polyphonic audio synthesizer.

New version 1.21
Old version 1.20
Release Notes Bug fix for SoundFont files that have an empty name.
Author Brad Howes
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audio Unit (AU)

Blue Mangoo Parametric Equalizer is an audio unit plugin, with six bands of filter controls.

New version 1.0.20
Old version 1.0.18
Release Notes 1. Fix bell when the q is too low & freq is too high.
Author Mani Consulting Limited Company
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)

The power of a digital audio workstation in the palm of your hand.

New version 5.0.4
Old version 5.0.3
Release Notes Welcome to MultiTrack 5! This update includes a huge number of features: AUv3 support for effects/instruments/generators with 2 window sizes, and presets support. MP3 export using Lame, with command line in Settings.app FFT with 7 coefficient Blackman Harris window in Parametric EQ screen, with decade lines. Complete UI overhaul, with better visibility, highlighting buttons, and dynamic resizing. Support for zooming tracks vertically. Track Header controls are resized and centered on the fly. VU Meters add segements and resize dynamically. Support for Slide Over / Split View on iPad (iOS 11 or better) Drag and drop from other apps / Files app. Drop multiple audio files directly onto tracks! With Snap Helpers while dragging. Regions/Tracks will be created if necessary, multiple dropped audio files line up vertically. Support for portrait mode on iPhone with up to 15 tracks visible simultaneously on iPhone in portrait, 22 on iPad, 24 on iPad Pro. Support for Emojis on track, song, audio, region, and folder names, in color. Reworked Song Menu, with folders, new icons for zips and audio files, animations, MultiTrack projects are now (.mtdaw) packages. Ability to drag audio/projects/folders and drop onto other folders, or hover over the folder to traverse into that folder, or hover over the Back button to traverse up the hierarchy, with animations. Ability to preview audio files from the song menu (opens shared browser with play/import buttons) WiFi web server reworked to look more like the song menu with better resizing. Ability to traverse folders from web interface. Added 'Springiness' to track scrolling, this solves the bug of not being able to adjust the start handle of a region at zero. Now, edit the region as normal, use one finger to pull the window right and another finger to access the region start handle. Added AU/IAA effects icons to tracks, these are untappable and indicate the current effects on the track. They mimic the AU/IAA effects panel and rearrange when effects are rearranged, with animations. This makes it easy to see the status of all your plugins at once, with loading indicators and error overlays. AU/IAA effects panel now has 'No-Clip' unity gain control with VU Meter. If a plugin is clipping, turn this control down. The signal will be automatically boosted by the inverse amount after the plugin return. 'Follow' menu option added, now the automatic following of the playhead can be disabled. Follow is now slightly more aggressive and will follow even when looping. Display of Beats/Time/Samples is now an optimized smearing number renderer (with glow). Song Menu remembers all song / audio / folder icon positions, and watches the current directory for changes in case a file is dropped from iTunes File Sharing, WiFi server or Drag&Drop. And MORE... 5.0.4 Bugfixes: Fix: backgrounding on older devices 5.0.3 Bugfixes: AU/IAA compatibility fixes 5.0.2 Bugfixes: iOS 13 compatibility updates. Fix: Chipmunk bug on frozen mono tracks without effects on mixdown. Fix: Folder renaming from the listbox no longer removes text after dot(.) in the folder name. Fix: Memory leak when closing songs with armed AU/IAA input plugins (generators/instruments). Fix: Projects over 16 tracks were hearing the underlying audio track when recording on a track. Fix: Better compatibility with AU/IAA plugins. 5.0.1 Bugfixes: Fixed song menu subicons for delete(X), zip, and rename box on 3x devices. Removed Bluetooth Low Energy, all bluetooth must now use A2DP due to poor sound quality. Set 'showsCloudItems' to NO in Music browser, music must be downloaded using the Music app before import. Fixed touch offset when dragging items and hovering over the Back button in song menu for devices with safety margins. Fixed placement of Input selector and AU/IAA effects panel and resized accordingly when rotating device. Fixed dynamic bubble placement for knob helpers. Fixed listbox content staying open when resized, content must close when resizing.
Author Harmonicdog
Type Host
Supports Inter-App Audio (IAA), Audiobus

NFM is an intuitive FM synthesizer with a streamlined interface.

New price $4.99
Old price $9.99
Author Nikolozi Meladze
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audio Unit (AU)

Gestrument Pro takes everything we loved about Gestrument and improves on its original functionality while introducing a host of new features such as multi-touch, recordable automations, advanced scale editing and our unique system of highly tweakable modular generators that define the pitches and rhythms.

New price $4.99
Old price $9.99
Author Gestrument AB
Type Instrument, Controller
Instrument type Sampler
Instrument sounds All-in-one
Supports Inter-App Audio (IAA), Audiobus

Flux Liquid Audio is a real time multi-effects processor and sequencer.

New price $5.99
Old price $7.99
Author 4Pockets.com
Type Effect
Effect type All-in-one
Supports Audio Unit (AU)

Navichord is a modern MIDI controller, working with software and hardware synths.

New version 2.6.12
Old version 2.6.11
Release Notes Fixed metronome occasionally skipping beats on some devices Fixed one beat skip in AUM when using Ableton Link Improved iCloud sync speed and robustness Added Recently Deleted folder, so you can recover accidentally deleted songs via Files app Fixed hanging notes for some MIDI devices Improved MIDI learn - next / previous chord action can go to the next song section Improved MIDI learn - next / previous section action loops around the song
Author Denis Kutuzov

Navichord is a modern MIDI controller, working with software and hardware synths.

New version 2.6.12
Old version 2.6.11
Release Notes Fixed metronome occasionally skipping beats on some devices Fixed one beat skip in AUM when using Ableton Link Improved iCloud sync speed and robustness Added Recently Deleted folder, so you can recover accidentally deleted songs via Files app Fixed hanging notes for some MIDI devices Improved MIDI learn - next / previous chord action can go to the next song section Improved MIDI learn - next / previous section action loops around the song
Author Denis Kutuzov
Type Instrument
Instrument type Sampler
Instrument sounds All-in-one
Supports Inter-App Audio (IAA), Audiobus, Ableton Link

Keynality is a key based musical instrument designed for composers, performers and producers to assist with making music with unfamiliar or unusual keys.

New price $0.99
Old price $2.99
Author Fraser Stuart
Type Controller
Supports Inter-App Audio (IAA), Audiobus

Metronomics is not only a metronome, but a tool designed to help build a solid sense of time and rhythmic security.  It's a new kind of metronome -- use Metronomics to generate random patterns, sequenced grooves, or a combination of both to help you practice with more than just your typical click track.

New version 8.1.3
Old version 8.1.2
Release Notes - Bug fixes - Added keyboard commands (+,- for tempo, numbers for time signatures) - Changed audio unit type (should work in more hosts now) - Changed default sample rate to 48k instead of 44.1 (this should match up with certain audio hosts better)
Author John Nastos
Type Instrument, Tool
Instrument type Sampler
Instrument sounds Other
Supports Audio Unit (AU), Ableton Link

The WoodStepper is a sequencer having both audio and midi out.

New version 3.0
Old version 2.1
Release Notes Synthesizer mode : - Each sequencer can be switched to synth mode both for VCO sources and the sample loop sources. - The steps can then be used to have parameter automation along the bar(s) played. - The VCO synth can be set to para-polyphonic mode (sending notes 2&3 to VCO’s 2&3), which allows a maximum of 12 voices. - The global polyphonic mode (between the 4 sequencers/synths) allows a maximum of 4 full polyphonic voices. - Synth mode also works when the sequencer is not running (new Advanced setting). - New Start Sequencer mode : a midi note received in a specified range, starts the sequencer. - Each sequencer/synth can set the range of receiving notes (allows for up to 4 split keyboard regions). - Samples (synth and sequencer) have new play back modes : random start, random slice, random reverse. - Samples now have a "1 shot" setting (avoids repeating when the number of samples < step time in sequencer mode or holding the key in synth mode). - Samples can now be loaded from file (.wav, .aif, .caf, etc). - Sample files should be in the folder "samples" in the iCloud WoodStepper folder. - In sequencer mode an offset can be set to select a part of the file (when the file duration is larger than the step time). - Presets now have a “Made By” and comment field.
Author Woodman's Immaculate Maple Syrup Studio
Type Tool
Supports Inter-App Audio (IAA), Audio Unit (AU)