# Otoo — Minimal groovebox & AUv3 host

> Minimal beat maker and sequencer with free-form note placement and AUv3 instrument support. (iPhone/iPad app by BeepStreet.)

- Source: https://appshunter.io/ios/app/otoo/id6759285903 (this page in markdown: same URL + `.md`)
- Developer: [BeepStreet](https://appshunter.io/developer/321412321)
- Category: Music, Entertainment
- Price: $6.99
- Rating: 5.00/5 from 28 App Store ratings · 20 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 64 MB
- Languages: American English
- Released: 2026-03-20
- Data updated: 2026-09-12
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/otoo/id6759285903/reviews.md

## What is Otoo?

Otoo is a streamlined, one-screen groovebox designed for frictionless music production.

Built around an innovative free-form step sequencer, Otoo breaks away from rigid grids, allowing you to place, drag, and stack notes freely across independent rows. Whether you are sketching out ideas using the native built-in engine and sampler or hosting your favorite third-party AUv3 plugins, Otoo delivers a distraction-free environment that prioritizes speed and musical flow.  

On iPhone, the interface dynamically scales to give your AUv3 instruments a near-fullscreen home, paired with a compact, highly responsive keyboard for immediate creation on the go.

Otoo also includes Otoo MIDI, an AUv3 MIDI processor version of the app. It brings Otoo’s pattern-based sequencing into compatible AUv3 hosts, where playback follows the host timeline and instruments are routed as MIDI Out destinations instead of audio instruments.

Distraction-Free Workflow

•  The single-screen layout keeps your sequence, arrangement and mixer visible at all times so you never have to dive into menus.
• A free-form step sequencer lets you place, drag, and stack notes across any row without rigid instrument or track restrictions.
• Step editing mode gives you precise control over note length, velocity, and timing subdivisions.
• The gesture-driven mixer allows for quick volume adjustments, muting, and soloing directly from the main grid.
• 4 rows on iPhone and 5 on iPad, with multiple instruments available in each row at different steps

• 2-octave keyboard for playing and learning real notes

Sounds and plug-ins

• Up to 8 instruments per project

• Built-in sounds and sampler

• Use any installed AUv3 instruments in a large, near-fullscreen view with a compact keyboard

• Up to 2 AUv3 effects per instrument

• Sampler with instant key-by-key recording and chromatic mapping

Patterns to full songs

• Build songs from simple patterns

• Draggable loop markers for quick arrangement changes

Performance mode

• Live sequencer and audio effects such as reverse, beat repeat, randomize, swing, triplet, tape, and more

• Play the pattern like a keyboard by tapping steps directly

Other features
• Main output with built-in level protection
• Automatic metronome when recording live into empty patterns
• Export patterns or full songs as WAV or MP3 for easy sharing
• Export performances as perfect loops
• MIDI export
• Supported time signatures: 4/4, 3/4, 4/4T and sequencer swing.

## Key features

- Free-form step sequencer
- Single-screen workflow
- Built-in sounds and sampler
- AUv3 instrument support
- Performance Mode effects
- Export WAV, MP3, and MIDI

## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/otoo/id6759285903/reviews.md

### 4/5 — Logic mdi Au3 missing

*2026-07-13*

While I’m able to use the otoo on Mac OS newly released midi AU 3 does not exist for logic

### 5/5 — OTOO is a Blast!!!!

*2026-05-06*

Well-Done! "Beep Street"   OTOO is a ton of fun!   Very well conceived and designed.  I just got it so I haven't figured out all the features yet, but its very simple to use, and not complicated. A real joy to use.  KUDOS!  To the design team!  Keep up the good work and THANKS!!!  PS: I love the full screen for selecting AUV3 instruments.

### 5/5 — Great App

*2026-05-05*

Great tool.

### 5/5 — Great app

*2026-04-18*

Superb sequencing app, I would like to see midi out, that would really complete it as a standalone sequencer

### 5/5 — Wonderful…but……

*2026-04-16*

Love this….and the Price….
For some reason, when I export a finished tune, part of an audio track is always….missing….or…sped up…..or….
Exporting both to AUM or AudioShare…..

### 4/5 — Loading logic AUV3

*2026-04-07*

While I can run this on the desktop, the only thing I can’t load in is logic plug-ins or any plug-in that relates to AU3 which is a shame. If you’re running this on the iOS then of course those. Mobile AU plug-ins would work please consider making any comp the Desktop AU that would open up more opportunities or even Best get it to work inside logic pro

### 5/5 — Great!

*2026-04-05*

What a great app! so easy to use, and sounds really good.. I would happily pay (much) more if this was Auv3 or inter app though... I predict sales would go vertical if this happened. Any plans?

### 5/5 — Almost Frictionless

*2026-04-02*

A wonderful step sequencer, the first I’ve actually enjoyed straight out of the gate. It’s not quite free-form however. Like many others, it’s ruled by fours. It would be wonderful if the pattern blocks came in ones, twos, threes AND fours, freely sequenced. This would allow nearly free-form rhythms, opening up for the more experimental folks. What do you think, devs?

**Developer response:** Thanks for the feedback! v.1.2 is out with 3/4 and 4/4T time signatures.

### 5/5 — I like this

*2026-03-27*

alot

### 5/5 — Otoo for Me and You

*2026-03-26*

An extremely accessible groovebox — the perfect introduction to sequencing for new musicians, and a fun and capable toy for everyone else. Another hit from BeepStreet!

## Frequently asked questions about Otoo

### What is Otoo?

Otoo is a music creation app featuring a free-form sequencer for building beats and melodies. It allows users to integrate built-in sounds, samples, and AUv3 instruments, offering live performance effects and song arrangement capabilities.

### How much does Otoo cost?

Otoo is a paid application, available for $4.99. This one-time purchase grants access to all its features without additional in-app purchases or subscriptions.

### What devices does Otoo support?

Otoo is compatible with iPhone, iPad, and iPod touch devices. It is designed to leverage the capabilities of each platform, offering a large instrument view on iPhone and a compact keyboard for immediate playing.

### Can I use my own instruments with Otoo?

Yes, Otoo supports the use of your favorite AUv3 instruments. You can integrate up to 8 instruments per project, with up to 2 AUv3 effects per instrument, providing extensive sound design possibilities.

### How can I share my music made with Otoo?

You can export your creations from Otoo in various formats. Patterns or full songs can be exported as WAV or MP3 files for easy sharing, and performances can be exported as perfect loops, with MIDI export also available.

### Does Otoo have ads?

No, Otoo does not contain advertisements. As a paid application, it provides an uninterrupted creative experience for users.

### What is the update frequency for Otoo?

Otoo was last updated on March 27, 2026, indicating a commitment to ongoing development and improvements. Users can expect regular updates to enhance functionality and stability.

### What age rating does Otoo have?

Otoo has an age rating of 4+, making it suitable for a wide range of users. This rating suggests that the content is appropriate for children and general audiences.

## Version history (last 5 releases)

### 1.4 — 2026-07-11

Otoo MIDI is here: a new AUv3 MIDI processor extension for using Otoo’s sequencer inside compatible hosts.

### 1.3 — 2026-04-01

Fixed an issue where sustained instruments could stop retriggering cleanly after several loop passes.

### 1.2 — 2026-03-27

What’s New
• Added support for time signatures in the Tempo panel: 4/4, 3/4, and 4/4T.
• Added MIDI export.
• Added audio recording in Performance mode. The Rec button now turns into a Tape icon, and recordings can be bar-quantized, prepared as perfect loops, and pasted into the Sampler.

Improved
• Steps in a row no longer stop overlapping notes, so glide now works properly with some instruments.

Fixed
• Fixed issues with some Bluetooth speakers and headphones.
• Fixed an issue where an instrument node could become invisible after being removed.
• Various minor fixes and improvements.

### 1.1 — 2026-03-20

Fixed issues with BlueTooth audio.

### 1.0 — 2026-03-20

No release notes.

## More apps by BeepStreet

- [iSequence HD](https://appshunter.io/ios/app/isequence-hd/id369873168)
- [GyroSynth](https://appshunter.io/ios/app/gyrosynth/id386527164)
- [Sunrizer synth](https://appshunter.io/ios/app/sunrizer-synth/id443663267)
- [Impaktor](https://appshunter.io/ios/app/impaktor/id557824278)
- [Zeeon synth](https://appshunter.io/ios/app/zeeon-synth/id1230960440)
- [DerVoco](https://appshunter.io/ios/app/dervoco/id1391057304)

All apps by BeepStreet: https://appshunter.io/developer/321412321

## Related topics

[otoo](https://appshunter.io/ios/topics/otoo)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-12.*