223+ iOS apps curated and reviewed
The best audio unit apps on iPhone average 4.7★ across 223+ titles — we've ranked them by what real users actually keep on their phones. Updated July 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.6★ (73) | No | No | Jul 2026 |
| 2 |  | Free | 4.9★ (27K) | No | No | Jul 2026 |
| 3 |  | Free | 4.7★ (41) | No | No | Jul 2026 |
| 4 |  | Free | 4.8★ (23) | No | Yes | May 2026 |
| 5 |  | Free | 4.6★ (27) | No | No | Jul 2026 |
| 6 |  | Free | 4.8★ (308) | Yes | Yes | Jul 2026 |
| 7 |  | Free | 4.6★ (46) | No | No | May 2026 |
| 8 |  | Free | 4.2★ (3K) | No | Yes | Jul 2026 |
This audio effect plugin offers advanced compression with new features like external sidechain input and a sidechain HPF control. It allows for cleaner sound with full bandwidth control and includes input/output level adjustments for easier tuning.
This is a free, open-source professional synthesizer app for iOS devices. It offers over 300 presets, MIDI support, a sequencer, and vintage-inspired filters. Learn music production basics and create your own sounds.
This audio plugin emulates the warm, noisy, and characteristic sound of vintage tape cassettes. It offers enhanced saturation, a new impulse response, and real sampled tape noise for a more authentic vintage audio experience. It can be used on entire tracks or individual channels for added texture and movement.
This audio effect plugin offers vintage-inspired tonal adjustments with five broad, interacting bands. It emulates an '80s approach to frequency shaping, allowing for precise control over your mix's clarity and low-end response. A demo version is available for trial before unlocking the full unlimited experience.
This audio effect plugin adds organic pitch fluctuations to your music, ranging from subtle natural variations to intense drifting. It helps break digital perfection and add richness to your tracks.
This powerful wavetable synthesizer app offers an intuitive workflow for creating new sounds. It features a rich library of wavetables, inspiring factory presets, and real-time modulation feedback for sound design.
This audio unit provides a five-band equalizer for iOS devices. It features adjustable low shelf, high shelf, and three parametric filters with a boost/cut range of 24 dB. Designed for signal coloring, it can be used in mono or stereo configurations.
Transform your voice into a musical instrument with a suite of advanced audio effects. Create robotic voices, harmonies, and unique soundscapes using only your voice. Save and share your creations, or integrate them into your digital audio workstation.
This app generates unique echo, reverb, and modulation effect textures instantly. It combines over 50 individual effects for endless creative possibilities. Ideal for musicians seeking spontaneous sonic inspiration.
This app provides a bundle of four professional audio unit synthesizers and one effect, inspired by popular eurorack modules. Explore diverse sound design possibilities with multi-mode oscillators, modal synthesis, string generation, and granular sampling. Compatible with DAWs and AU hosts for creative music production.
This is an Audio Unit EQ for iOS and macOS, functioning as a container for documentation. It provides a seven-band equalizer with various filter types, adjustable frequency ranges, and Q factors. It requires an Audio Unit host or DAW to operate.
This audio effect plugin provides a lush, one-button chorus inspired by analog synthesizers. It adds dimension and depth to music tracks with a dark, detuned character. A mix slider allows for blending the effect to your preference.
This audio plugin splits a single audio signal into up to four separate frequency bands. It allows for unique multiband processing using effects plugins not originally designed for this purpose, offering flexibility in audio manipulation for music production.
This audio unit plugin creates a subtle delay between stereo channels, mimicking the Haas effect for a wider, more natural stereo image. It offers precise control over small delays and includes pitch modulation when changing delay times.
This audio effect application provides vibrato, chorus, and multi-stage driven filters for iOS. It enhances instruments like keyboards, guitars, and bass with depth, color, and psychedelic textures. The app functions as a container and documentation for an Audio Unit (AU) and requires a host application to operate.
Explore multidimensional sound design and performance with this polyphonic synthesizer. Create unique evolving soundscapes by navigating sonic universes and sculpting fluid sounds. Features a built-in keyboard, MPE support, and a diverse library of timbres.
This pro-sounding reverb plugin offers a simple, three-knob interface for iOS devices. It functions as an Audio Unit (AUv3) plugin within popular DAWs and is also open-source for developers to use in their own projects.
This audio effect app provides two distinct delay units for complex sound manipulation. It features a three-tap delay with independent SVF filters and a feedback delay, offering extensive control over resonance, drive, and stereo separation.
This powerful audio editor allows for cutting, splicing, and mixing audio files. It also supports format conversion, voice changing, and extracting audio from videos. Create custom ringtones and unleash your musical creativity with a wide range of editing tools.
This app recreates the warm sound of an 80s bucket brigade chorus effect. It functions as an audio unit that can be integrated into any digital audio workstation (DAW) on your devices.