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
DAW Cassette
DAW Cassette is an Audio Unit effect that emulates the sound of a classic tape deck
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
26 ratings · Top 15%
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 included15 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 DAW Cassette: 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
Offer more tracks in the free tier or a one-time purchase option.
Assumption to check: Limited track count for free users
Validate with people who use this workflow before building.
Hypothesis 2
Include interactive tutorials or onboarding experiences.
Assumption to check: Steep learning curve for beginners
Validate with people who use this workflow before building.
Hypothesis 3
Introduce more sophisticated editing tools and effects.
Assumption to check: Lack of advanced editing features
Validate with people who use this workflow before building.
Hypothesis 4
Optimize audio handling and improve performance.
Assumption to check: Occasional audio playback issues
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
DAW Cassette is an Audio Unit effect that emulates the sound of a classic tape deck. The intuitive and easy-to-use controls make it a versatile tool for adding warmth and character to a specific track or your entire mix. Features: • Choose between three different tape types (normal, chrome, metal) • Control the noise level (High, Low, Off) • Tape-, head- and motor* quality knobs for dialling in the perfect sound • Additional input gain, output gain and dry/wet mix parameters for convenience * Motor quality only emulates wobbling in this plugin (no slow down effect). DAW Cassette works both as a standalone app, and as an AUv3 plugin. Check out the product web page for more info, sound examples and a user manual. https://klevgrand.se/products/dawcassette Feedback or suggestions? Drop us a mail: support(at)klevgrand.se or @klevgrand on Twitter.
Written user reviews are not shown here. Check current App Store reviews >
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.
