Otoo
Playful Groovebox & Sequencer
$4.99 · Designed for iPad. Not verified for macOS.
Otoo is a fun, one-screen music maker designed to get you creating right away.
Its free-form sequencer lets you place, drag, and stack notes freely - no more rigid rows. Use the built-in sounds, the sampler, or your favorite AUv3 instruments, then remix ideas live with hands-on Performance Mode effects.
On iPhone, Otoo makes AUv3 instruments feel at home with a large instrument view and a compact keyboard for immediate playing.
Beautifully simple workflow
• Free-form step sequencer with instruments not tied to fixed rows
• Single-screen workflow with sequence, song structure, and mixer always visible
• Tap or drag notes onto the grid to build beats and melodies
• Stack notes to create chords
• Per-step control of length, subdivision, and velocity
• 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
• Multi-gesture mixer for switching instruments, muting, soloing, and adjusting volume
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.
Fixed an issue where sustained instruments could stop retriggering cleanly after several loop passes.
The developer, BeepStreet, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jaroslaw Jacek
- Size
- 63.8 MB
- Category
- Music
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPad
Requires iPadOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.5 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 BeepStreet
