Otoo

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.