The OPL is a digital sound synthesis chip developed by Yamaha in the mid 1980s. Among other products, it was used in sound cards for PC, including the Ad Lib card and early Sound Blaster series.
| Price | $9.99 |
|---|---|
| Author | DiscoDSP LLC |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Rating | total: (22), current: (22) |
| Released | 06/04/2020 |
| Updated | 03/06/2026 |
OB-Xd is based on the Oberheim OB-X. It attempts to recreate its sound and behavior, but as the original was very limited in some important ways, a number of things were added or altered to the original design.
| Price | $14.99 |
|---|---|
| Author | DiscoDSP LLC |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Rating | total: (63), current: (63) |
| Released | 05/28/2019 |
| Updated | 03/31/2023 |
A strange noise-making device.
| Price | Free |
|---|---|
| Author | David Gamble |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Audiobus |
| Rating | total: (10), current: (10) |
| Released | 02/25/2014 |
| Updated | 10/31/2015 |
HOWL is a simple vocoder/synthesizer. It uses formants to simulate the human voice and a pitch-space keyboard to help you find interesting melodies.
| Price | Free |
|---|---|
| Author | Daniel Clelland |
| Type | Instrument, Effect |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Effect type | Vocoder |
| Supports | Audiobus |
| Rating | total: (39), current: (39) |
| Released | 12/20/2015 |
| Updated | 08/16/2024 |
SpringSound is a physical-modeling audio synthesizer that produces sounds by simulating interactions and vibrations of a set of activators and masses connected to springs.
| Price | $2.99 |
|---|---|
| Author | Christophe Duquesne |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Inter-App Audio (IAA), Audiobus |
| Rating | total: (19), current: (19) |
| Released | 09/28/2014 |
| Updated | 03/11/2026 |
Play with the sound of a full cathedral organ, created by award-winning sound designer Kurt Ader.
| Price | $14.99 |
|---|---|
| Author | Christian Schoenebeck d/b/a Crudebyte |
| Type | Instrument |
| Instrument type | Sampler |
| Instrument sounds | Keyboards |
| Supports | Inter-App Audio (IAA), Audiobus, Audio Unit (AU) |
| Rating | total: (15), current: (15) |
| Released | 12/20/2014 |
| Updated | 01/19/2026 |
Colossus Piano sets a new standard in terms of realism, detail and overall quality of piano sounds on your iPad, iPhone and iPod touch.
| Price | Free |
|---|---|
| Author | Christian Schoenebeck d/b/a Crudebyte |
| Type | Instrument |
| Instrument type | Sampler |
| Instrument sounds | Keyboards, Piano |
| Supports | Inter-App Audio (IAA), Audiobus |
| Rating | total: (64), current: (64) |
| Released | 11/17/2016 |
| Updated | 01/19/2026 |
The second best sounding piano app in the App Store (after "Colossus Piano")!
| Price | $14.99 |
|---|---|
| Author | Christian Schoenebeck d/b/a Crudebyte |
| Type | Instrument |
| Instrument type | Sampler |
| Instrument sounds | Keyboards |
| Supports | Inter-App Audio (IAA), Audiobus |
| Rating | total: (15), current: (15) |
| Released | 11/02/2012 |
| Updated | 01/19/2026 |
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.
| Price | $19.99 |
|---|---|
| Author | Chris Carlson |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Audiobus |
| Rating | total: (126), current: (126) |
| Released | 10/16/2012 |
| Updated | 05/13/2020 |
This app reproduces the functionality of Casio’s best-selling CZ-series models, such as the CZ-101 (first released in 1984), and also includes new functions.
| Price | $14.99 |
|---|---|
| Author | CASIO COMPUTER CO., LTD. |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Inter-App Audio (IAA), Audiobus |
| Rating | total: (8), current: (8) |
| Released | 01/20/2015 |
| Updated | 02/14/2018 |
Mononoke is an unconventional synthesizer, designed to compose evolving soundscapes and musical textures.
| Price | $8.99 |
|---|---|
| Author | Bram Bos |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Audiobus, Audio Unit (AU) |
| Rating | total: (102), current: (102) |
| Released | 01/17/2020 |
| Updated | 09/17/2021 |
A full-blown 6-Operator FM Synth on iOS, building on the legacy of the classic synthesizers that defined the digital era of the 1980s.
| Price | $3.99 |
|---|---|
| Author | Bram Bos |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Audiobus, Audio Unit (AU) |
| Rating | total: (33), current: (33) |
| Released | 10/20/2016 |
| Updated | 11/29/2018 |
This is a very simple yet powerful iOS app that performs as a polyphonic audio synthesizer.
| Price | $7.99 |
|---|---|
| Author | Brad Howes |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Audio Unit (AU) |
| Rating | total: (137), current: (137) |
| Released | 02/19/2019 |
| Updated | 01/26/2026 |
The BLEASS Alpha Synth is a virtual analog polyphonic stereo synthesizer inspired by classic analog synths and enhanced by the BLEASS’ very own musical and technical approach.
| Price | $14.99 |
|---|---|
| Author | BLEASS |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Audio Unit (AU), Ableton Link |
| Rating | total: (109), current: (109) |
| Released | 02/02/2020 |
| Updated | 06/19/2024 |
Fed up with standardized presets and instruments? Feel lost in overcomplex filters and effects? Don’t wanna sound like everyone else? BLEASS is just the right instrument for you: it unleashes your inner musical creativity by bringing music production and performance to its very core: play, perform, compose beats and melodies in a new yet intuitive way thanks to its multitrack sequencer, synthesizer and drum machine.
| Price | Free |
|---|---|
| Author | BLEASS |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Inter-App Audio (IAA), Audiobus, Ableton Link |
| Rating | total: (37), current: (37) |
| Released | 10/28/2018 |
| Updated | 05/22/2025 |
Dagger is an analog modeling paraphonic synth with a big, raw analog sound.
| Price | $4.99 |
|---|---|
| Author | BeepStreet |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Audio Unit (AU) |
| Rating | total: (42), current: (42) |
| Released | 08/04/2023 |
| Updated | 08/04/2023 |
Zeeon is a virtual analog synthesizer, powered by an advanced analog circuit modeling engine.
| Price | $14.99 |
|---|---|
| Author | BeepStreet |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards |
| Supports | Audio Unit (AU) |
| Rating | total: (208), current: (208) |
| Released | 08/30/2017 |
| Updated | 11/07/2025 |
orphinio for iPhone is a musical instrument with a unique sound between glockenspiel and jaw harp.
| Price | $0.99 |
|---|---|
| Author | Bastus Trump |
| Type | Instrument |
| Instrument type | Synth |
| Instrument sounds | Keyboards, Other |
| Supports | Audiobus |
| Rating | total: (15), current: (15) |
| Released | 12/17/2013 |
| Updated | 10/04/2015 |