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.


246+ iOS apps curated and reviewed
The best audio unit apps on iPhone average 4.6★ across 246+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 4.7★ (32) | No | No | Aug 2026 | |
| 2 | Free | 4.6★ (76) | No | No | Aug 2026 | |
| 3 | Free | 4.2★ (3K) | No | Yes | Aug 2026 | |
| 4 | Free | 4.9★ (27K) | No | No | Aug 2026 | |
| 5 | $2.99 | 5.0★ (3) | No | No | Aug 2026 | |
| 6 | $6.99 | — | No | No | Aug 2026 | |
| 7 | Free | — | No | No | Aug 2026 | |
| 8 | Free | 4.8★ (23) | No | Yes | Aug 2026 |


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 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.






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 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 effect plugin generates natural resonances to add warmth and fullness to instruments or recordings. It offers controls for acoustic body characteristics and includes an additional reverb effect for standalone use. The app utilizes unique, realistic algorithms for its sound shaping capabilities.






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 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.


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 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 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 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 audio effect app adds harmonics to sound by folding waveforms. It's ideal for enhancing synth leads, transforming drum loops, and creating ambient drones. Customize folding thresholds and modulation for unique sound design.


This audio plugin offers powerful parallel compression for music production. Enhance drums and add weight to tracks with its aggressive sound. Unlock advanced controls and presets for surgical precision in the full version.


This audio plugin expands the stereo width of mono signals to create a more immersive sound. It uses a unique algorithm to ensure phase coherence, preventing muddiness and maintaining signal integrity when summed to mono. Achieve up to 200% stereo width for an exaggerated, wide effect.


Separate vocals, instruments, and more from your music. Integrate with DAWs on iOS and macOS for custom mixes, practice, or remixing. Offers multi-bus output and individual track volume control.


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 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.