This app brings the iconic theremin sound to your mobile device and computer. It offers touch-controlled virtual instrument capabilities with extensive sound shaping options and MPE support for DAWs.
4.7(12 ratings)
$7.99
Best apps like OB-Xd 3 AUv3 Synth
6+ similar apps compared and reviewed
4.7 avg rating
0 free apps
Updated September 2026
Looking for something like OB? We've analyzed 6+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.
Top Alternatives to OB
Atoms Synthesizer - Baby Audio by Baby Audio Inc.
Physical Modeling SynthesizerStrong Contender
🎵 Music
4.2(18 ratings)
$29.99
This application utilizes advanced physical modeling to create unique organic and otherworldly sounds. It offers a virtual laboratory for advanced sound design with a mass-spring interaction engine, motion automation, and physically modeled effects. Explore endless sonic possibilities for music production.
5.0(5 ratings)
$14.99
This app is a polyphonic synthesizer inspired by 1960s California west coast synthesis. It features wave folding, lowpass gates, and step sequencers for generative music creation. It functions as a standalone app or an AudioUnit Extension across iPhone, iPad, and Mac.
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4
Zodiak Taurus Mega Octavizer
Effect for Guitar & Studio
$14.99
This app generates five independent voices of your input signal across five octaves, offering extensive sound shaping capabilities. It features individual saturation, detune, delay, and EQ for each voice, plus cabinet simulators and room emulation for a complete audio solution. It works as an AUv3 plugin on Apple devices.
Five independent voices across five octavesIndividual voice saturation, detune, and delayAttack envelope and tuned EQ per voice
🎵 Music
(15)
paid5
Aries Rotary Speaker & Amp
Cab FX for Guitar & Keyboards
$14.99
This app simulates rotary speakers and amplifiers for instruments like guitar, organ, and vocals. It offers detailed sound shaping with multiple cabinet and amp types, plus post-effects for professional-grade tones. Create, save, and share your custom sounds.
Rotary speaker and amplifier simulationSix distinctive cabinet typesSix virtual-tube amplifiers
🎵 Music
(10)
paid6
Surreal Machines Modnetic
Tape Delay, Reverb and Fx
$9.99
This app offers four distinct audio effects: analog-style tape delay, realistic spring reverb, bucket brigade modulation effects, and classic tone shaping. It blends analog warmth with digital precision for studio or live use.
Analog-style tape delayRealistic spring reverbBucket brigade chorus/flanger/phaser
🎵 Music
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paid