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.
WatsonMIDI™ is the professional MIDI recording and playback app for pipe organ and electronic organ musicians
$1.99 · In-app purchases
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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Generating… usually about a minute.
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 WatsonMIDI: 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 MIDI editing tools compared to professional software.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor user onboarding and guidance.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of collaborative features.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No export options for MIDI files.
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.
WatsonMIDI™ is the professional MIDI recording and playback app for pipe organ and electronic organ musicians. Developed with over 20 years of organist input, WatsonMIDI™ captures, organizes, and shares your musical performances. RECORD & PLAYBACK Capture performances with a single tap. Records all MIDI data including notes, expression pedal movements, and registration changes. Play back through any MIDI-connected organ exactly as performed, or route to virtual organ software like GrandOrgue and Hauptwerk. ORGANIZED LIBRARY Build a recording library with custom folders for each venue, season, or occasion. Search instantly across hundreds of recordings. Import existing MIDI files from other systems. SERVICE PLAYLISTS Create playlists for worship services, concerts, recitals, and special events. Arrange recordings in any order and play through them seamlessly. Perfect for substitute organists. PROFESSIONAL FEATURES Instant transposition - shift playback up or down without re-recording Tempo adjustment - speed up or slow down for practice Loop playback - repeat recordings continuously Play-along mode - play live while a recording plays back Listening mode - hear playback through your device speakers MIDI Monitor - view incoming MIDI data in real-time PROTECT YOUR WORK Share recordings with military-grade AES-256 encryption. Set play limits and expiration. Your intellectual property stays protected — only WatsonMIDI™ can play your shared content. MAESTRO - FOR ORGANISTS & TECHNICIANS For musicians who play multiple instruments and technicians who service them: Organ Profiling - capture any instrument's complete stop list, divisions, and MIDI channel mapping. Build a profile library of every organ you play or maintain. Translation Engine - a first for the organ world. Record at one church, play back at another with stops mapped automatically. Tag your existing library with a profile, then translate to any profiled organ — a recording from a Rodgers digital organ can play back on a 43-rank pipe organ. Professional Tuning - chromatic strobe tuner with four display modes, real-time pitch detection, wireless remote tuning via Bluetooth from inside the chamber, historical temperament support, cents offset, chromatic walk, interval checks, and reference tone generation. UNIVERSAL COMPATIBILITY Pipe Organs - Peterson ICS, Syndyne, Matters, and MIDI-equipped consoles Digital Organs - Rodgers, Allen, Johannus, Viscount, Lowrey Digital Pianos - Yamaha, Roland, Kawai, Nord Theater Organs - Wurlitzer, legacy instruments with MIDI Virtual Organs - GrandOrgue, Hauptwerk via IAC Driver or virtual MIDI Keyboards & Synthesizers - any MIDI-capable keyboard FLEXIBLE PRICING All one-time purchases, no subscriptions: Practice ($1.99) - 5 recordings, 1 playlist Audition ($49.99) - 50 recordings, 5 playlists, folders Recital ($199.99) - Unlimited recordings and playlists Symphony ($499.99) - All features plus encrypted sharing and audio recording Maestro ($999.99) - Organ Profiling, Translation Engine, Professional Tuning, Apple Watch and Console Power Control CONNECTIVITY Bluetooth MIDI or wired USB/Lightning. Auto-reconnect remembers your last device. Separate MIDI Routing for virtual instrument setups. Whether you're a church organist, concert artist, substitute musician, or organ technician, WatsonMIDI™ is the essential tool for modern MIDI organ work. From Watson Pipe Organ Company - Music for Generations.
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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.