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.
Create out of this world ambiance with Blackhole, a reverb effect as big as the cosmos
$9.99 · 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 Blackhole Reverb: 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 preset management options
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No support for audio file imports
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent audio quality on different devices
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social sharing features
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.
Create out of this world ambiance with Blackhole, a reverb effect as big as the cosmos. Blackhole breaks the rules by allowing you to create virtual spaces that could never exist in reality. At large sizes, its soft attack and lingering, harmonic tails allow it to really shine on guitars, strings, vocals and pads. At small sizes those very same qualities can add an angelic sheen to vocals or turn a simple drum track into an otherworldly rhythm section. Features: - Incredibly easy to use with over 80 presets; many created by Eventide artists. - Ability to create extremely musical effects useful for highlighting key instruments. - Supernatural settings for abstract spatial effects and drones. - Subtle settings for ambient washes and track highlighting. - Unique “Gravity” control reverses the arrow of time by inverting the reverb's decay. - Innovative Ribbon and Hotswitch allow for changing any combination of parameters simultaneously. - Fully flexible mono and stereo options. Bring new realms of stereo imaging to mono instruments. - Mixlock allows for scrolling through presets or settings while keeping the wet/dry mix constant. - Available as an Audio Units AUv3 plug-in and Standalone App.
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.