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
Patterning for iPhone
PATTERNING, the award winning circular drum machine, is now available on iPhone in a streamlined, phone-optimized form.
$7.99 · In-app purchases
PRICE
$7.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
246 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 included16 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 Patterning for iPhone: 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 library with user-uploaded samples.
Assumption to check: Limited sound library compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Create an onboarding tutorial for new users.
Assumption to check: Steep learning curve for new users
Validate with people who use this workflow before building.
Hypothesis 3
Improve timing accuracy and latency.
Assumption to check: Inconsistent playback timing
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to share and collaborate on patterns in real time.
Assumption to check: No collaboration 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
PATTERNING, the award winning circular drum machine, is now available on iPhone in a streamlined, phone-optimized form. As beautiful as it is powerful, Patterning is a deep and flexible drum machine unlike any you’ve encountered before. With its elegant circular interface, Patterning transforms your phone into a seriously inspiring tool for making beats. Create dynamic drum patterns with the swipe of a finger. Make evolving, poly-metric rhythms, four-on-the-floor dance party jams, or laid back R&B grooves. Use Patterning’s independent loop settings to explore untapped rhythmic possibilities. Automate parameters to create intricate & complex beats. Record beats. Choose from hundreds of free factory and user created drum kits. Connect to your rig with Inter-App Audio, MIDI, and Ableton Link. Export your beats to perfect audio loops or directly to an Ableton Live Set. Patterning for iPhone gives you access to the most popular and useful features of the full Patterning 2 for on-the-go beat making. 8 Independent Loops Per Pattern Unlimited Patterns Automation Layers like Coarse Tune, Ratcheting, and more. MIDI Output Export to Ableton Live Set - Comes with Ableton Live 11 Lite Export Perfect Audio Loops in WAV or AIFF format, Stereo or Multitrack Output Export Songs to Patterning 2 Import Songs and Drumkits from Patterning 2 (some limitations apply) Ableton Link MIDI Clock Send and Receive Inter-App Audio Clock Multi-track Inter-App Audio Output Hundreds of free factory and user created drum kits Quantize Pattern Launch Haptic Feedback! And more! Important Note for iPad owners ----- Please check out Patterning 2 if you wish to use this app on the iPad. Patterning 2 is the full-featured, full-screen, big sibling to this phone version, and includes many, many, many additional features. The phone version is streamlined and simplified to fit on your phone's screen.
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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.
SUGGESTED BUILD STACK
React Native
Expo
React Navigation
react-native-sound
expo-av
Zustand
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.
