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.
App Overview
TC-11
TC-11 is the only fully programmable multi-touch synthesizer for the iPad
$24.99 · In-app purchases
PRICE
$24.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
64 ratings · Top 5%
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for TC-11: 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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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Expand sound options with user-generated content or partnerships.
Assumption to check: Limited sound library compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Simplify onboarding with tutorials or guided tours.
Assumption to check: Complexity in learning the interface
Validate with people who use this workflow before building.
Hypothesis 3
Optimize audio processing and app performance.
Assumption to check: Performance issues with large projects
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate sharing and collaboration tools for users to connect.
Assumption to check: Lack of social features
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
TC-11 is the only fully programmable multi-touch synthesizer for the iPad. Choose from the 160 included presets, or build your own using touch controls, device motion, and on-board modules. Create music with the next evolution of synthesizer control! iDesignSound App of the Week 12.17.2011 - idesignsound.com "This thing is ALIVE! TC-11 is really fascinating and I'm having some fun experimenting with it. It is very, very cool!" - Jordan Rudess, keyboardist, Dream Theater "TC-11 is making my jaw drop every few minutes; realizing new and increasingly complex routing options. Rating: Essential." - Tim Webb, discchord.com "Creating, routing, configuring, and general tweaking is unbelievably robust and complex. This is a big leap forward in design. A madhouse of sonic possibilities at your touch." - David Israel, smitematter.com FEATURES: √ 185 built-in presets √ Unlimited user patches √ Audiobus + State Saving √ Fully controlled by multi-touch / device motion √ Built-in recording + AudioCopy √ 23 modular synthesis objects √ 22 oscillator waveforms √ 4 controller modules: AHDSR, LFO, Table, Sequencer √ Email custom patches to your friends √ Full display customization MULTI-TOUCH CONTROL: There are no on-screen knobs, keys, or sliders to fiddle with; all synthesis is driven by your multi-touch performance. Touch relationships like distances / angles / timings perform all the controller functions. It's just you and the full screen multi-touch performance area. EVERY synthesis parameter can be controlled by ANY multi-touch controller. The patch possibilities are limitless! DEVICE MOTION CONTROL: Use the iPad's accelerometer, gyroscope, and even the compass to attack your synthesis patch! Tilt and move the iPad to change any filter, effect, or module. You can create real vibrato by moving the iPad during performance, or change the speed of a sequencer by tilting forward and backward! SYNTHESIS: TC-11 has 8 voice polyphony for full, real-time synthesis. The audio engine has been highly optimized to deliver crisp, responsive performance. Choose from 22 oscillator waveforms, 3 oscillator types, 3 filter types, 4 unique effects, amplitude modulation, and panning control. Fully programmable AHDSR, LFO, and sequencer modules make TC-11 the most capable iOS synthesizer in the world. Use TC-11 in your band during live performances. Add TC-11 into your laptop orchestra. Experiment and create with the next evolution of synthesizer control! Download the complete user guide to read more: http://www.bitshapesoftware.com/instruments/tc-11/tc-11-user-guide-2.0.pdf
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Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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BUILD KIT DIFFICULTY
Advanced
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.
