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.
MIDI Strummer is an AUv3 plugin designed to simulate guitar strumming and picking techniques
$7.99 · 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.
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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 MIDI Strummer AUv3 Plugin: 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 capabilities
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Performance issues with larger patterns
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of user support and documentation
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited effects options
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.
MIDI Strummer is an AUv3 plugin designed to simulate guitar strumming and picking techniques. It can used to generate MIDI note data which can be sent to either an external synth of choice or the internal soundfont engine. The inbuilt soundfont player allows you to import all your favourite .SF2 and .DLS soundfonts and use them as a sound source. MIDI strummer has a set of 16 definable chord pads that can hold a series of chords, which in turn can be triggered remotely via MIDI messages or by tapping the pads. Use the pattern editor to create a series of picking or strumming patterns that can be tranposed to the selected chord pad. Song mode allows you to chain these chord patterns together to form songs combining both picking and strumming patterns within the same song. Enable 6/12 string on a particular part to emphesize a pert by adding depth. Strummer also features a number of audio effects that can be used to enhance the audio from the soundfont player. These include overdrive, distortion, tremolo, chorus, phaser, graphic EQ, digital delay and reverb. Key Features: • 6 and 12 string emulations. • Simulate strum up/down with variable speeds. • Create patterns up to 64 steps in length. • Load up to 6 pattern variations. • Ramdomize and rotate options. • Songs can be up to 255 steps in length. • Built in ARP function. • Import your own soundfonts. • 8 different effect types (reverb, delay, phaser, chorus, overdrive, distortion, tremelo and EQ). • Paramter Automation from your DAW using MIDI. • Built in Sampler. • Comprehensive Help pages included. Please Note: This version is now compatible with GarageBand running on iOS14.
Written user reviews are not shown here. Check current App Store reviews >
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.