3.9 / 5

Pocket Drummer

Play anything, get a drummer who actually listens

Useful

Instant

The Problem

Drum machines are rigid; practicing to a click track is lifeless; real drummers unavailable

Current Solutions (Not Great)

Metronomes (no feel), drum loops (don't follow you), drum machines (programming required)

Who Needs This

Solo instrumentalists, singer-songwriters, guitarists, pianists, bassists practicing alone

Drum machines and loops don't respond to you—they're rigid patterns that you must follow. Pocket Drummer is a drummer that follows you: play faster, it speeds up; accent a phrase, it adds a fill; drop to a quiet verse, it switches to brushes. It detects your tempo from note density, your intensity from velocity, and your phrasing from note patterns. The AI drummer listens and reacts like a real musician would, making practice feel like playing with a responsive human drummer.

Honest Take

Lots of competition from apps like Apple's Drummer and various AI drummer VSTs, but genuinely responsive drumming that follows you (not just matches tempo) is still rare. The technical challenge is making it feel natural rather than just algorithmic—real drummers anticipate and push/pull, which is hard to replicate.

Monetization Ideas

Ways to turn this into revenue

Freemium

Free basic, $5-15/mo for pro

One-Time Purchase

$9-49 per license

Subscription

$5-29/month or $49-199/year

Features

Key features that make this app valuable

Automatic tempo detection from playing
Intensity matching
Genre-appropriate patterns
Intelligent fills at phrase boundaries
Dynamics (brushes to full kit)
Section detection (verse/chorus feel)
Hi-hat/ride variations
Crash cymbals on cues

Build Prompt

Use this prompt with an AI assistant to start building

Build a React PWA called 'Pocket Drummer' using WebInfer and Web MIDI API. MIDI input: any instrument (piano, guitar via MIDI pickup, bass). Analysis pipeline: track note-on events with timestamps. Calculate: tempo from inter-onset intervals, intensity from average velocity, phrase boundaries from rests > 1 beat. AI generates drum pattern with generateObject: { tempo: number, intensity: 'soft'|'medium'|'loud', pattern: { kick: number[], snare: number[], hihat: number[], ride?: number[] }, fill: boolean, fillPattern?: number[], crashOnOne: boolean, style: 'straight'|'swing'|'shuffle' }. Drum sequencer: 16-step pattern at detected tempo, trigger samples via Web Audio. Fill detection: when rest detected after phrase, insert fill before next downbeat. Style presets: Rock, Jazz, Pop, R&B, Latin, Brush Ballad. UI: animated drum kit visualization, tempo display, intensity meter, style selector. 'Lock tempo' toggle for when you want AI to follow vs. you following AI. Drum kit selector: acoustic, electronic, brushes, percussion. Record output as audio or MIDI.

Score Breakdown

Pain