Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
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Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for BeatMaker 2: map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Limited sample options and not enough customization features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Audio latency issues during playback
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Steep learning curve for beginners
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Cluttered interface leading to confusion
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
*** BEATMAKER 3 IS AVAILABLE NOW ! *** BeatMaker 2: Advanced mobile music workstation. Combining music production tools that were behind the success of countless artists, BeatMaker 2 is a powerful, easy-to-use composition interface for amateurs and professionals alike. Build your own virtual home-studio, create multiple instruments and connect them to a full-range of audio effects. Compose, record, arrange and transform your ideas into complete songs, ready to be shared with others. Import your own sounds or use the sound library provided: more than 170 high-quality instrument and drum presets from synthesizers to realistic orchestral sounds. You can even import songs from your iPod library! Connect your MIDI accessories for an external control of BeatMaker's instruments, effects and mixer, ideal for home-studio productions and live performances. Compatible with audio interfaces with the Camera Kit (iPad only). Works on all iPhone, iPod and iPad models starting with third generation devices (iPhone3GS, iPod3G 32GB, iPhone 4/4S/5, all iPads). * STUDIO: - Create multiple instruments with Drum Machine, Keyboard Sampler, Audio Tracks - 11 effects: Reverb, Compressor, Filter, Delay, EQ, Flanger, Chorus, AutoPan, BitCrusher, Overdrive, 6-Band Parametric EQ - 3 effect slots for each instrument - CoreMIDI support: connect your MIDI accessories to control instruments, effects and mixer. * DRUM MACHINE: - 128 trigger pads: 16 pads over 8 banks - Chop Lab: Slice audio loops to automatically create new sound presets - Control sound parameters on individual pad: volume, pan, mute, output bus, semitone, fine tune, reverse and autoscaling - Low/high pass filter per pad - Pad trigger modes: one-shot, hold & loop - ADSR Envelope ADSR control for each pad - Exclusive groups and polyphony management - "Live" modes: trigger, mute, reverse, velocity and tune spreading. - Pad copy & paste * KEYBOARD SAMPLER - 128-key keyboard with pitch wheel, double keyboard mode, note display and zoom controls - Easily create your own instruments from any sample combination with the keygroup editor - Volume and filter ADSR envelopes - Low/high pass filter with key tracking - 2 LFOs to control volume, pitch and filter parameters - Polyphony control, up to 32 voices - Legato play mode with glide - Velocity layers * AUDIO TRACKS: - Add audio tracks for recording and sample playback directly on the sequencer - Record multiple audio tracks simultaneously - Gain and noise gate on audio inputs - Support for disk streaming to load samples without consuming RAM * MULTI-TRACK SEQUENCER - Create unlimited instrument, audio and FX tracks - Automations: Record, edit and replay instrument and effect parameters - Record, draw, arrange and resize patterns along the timeline to build your song - Compose and modify patterns with a piano-roll interface. Edit notes, parameters and automations. - Instrument and effect recording options: Quantize, take or partial undo, pre-roll, Overdub, note erasing. * WAVE EDITOR - Full-fledged wave editor with intuitive interface for manipulating samples - Basic edition tools: trim, cut, copy, paste, with undo/redo - High quality time-stretching and pitch-shifting algorithms - Audio tools: normalize, silence, reverse, fade in and out, cross-fade - Record new samples from microphone or instruments - Loop points and tempo/signature editor * MIXER CONSOLE - Realistic multi-track mixer with level meters - Edit volume, pan, solo, mute and bus routing features for each track - Four sends available for each instrument/audio tracks * LARGE SOUND BANK INCLUDED * SHARING & GLOBAL OPTIONS - MIDI files import/export - MIDI Out, Sync, Thru support - Virtual MIDI support - Korg's WIST support - Transfer files from/to your computer via iTunes or FTP - Import songs from your iPod library to create new remixes - Upload songs to your SoundCloud account - DropBox support - Share audio content via iOS pasteboard
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.