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.
Raw Tuner is a reliable instrument tuner for musicians.
$0.99 · 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 Raw Tuner: 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 audio input options for different devices
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Calibration issues with certain instruments
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of visual customization options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social sharing or community 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.
Raw Tuner is a reliable instrument tuner for musicians. - Simple and accurate tuning experience - Super lightweight to accommodate all devices - No ads, no data collection - Single purchase of $1 for life Perfect pitch, every time. For every instrument. Whether you're playing guitar, bass, banjo, or ukulele, get tuned quickly with technology you can trust. From practice sessions to recordings, from acoustic gigs to electric performances, Raw Tuner provides the precision and reliability musicians need. Stop struggling with out-of-tune instruments and unreliable tuning methods. Raw Tuner makes staying in tune effortless, so you can focus on what matters most - creating and sharing great music. Download now and tune with confidence. Key Features: - Multi-Instrument Support - Guitar, bass, ukulele, banjo, violin, mandolin, and more. Raw Tuner recognizes different instruments and provides appropriate tuning solutions. - Flexible Tuning Options - Standard, drop, open, and custom tunings available. Create and save personalized tuning presets for different playing styles. - Accurate Pitch Detection - Reliable audio processing ensures precise tuning. Our pitch detection technology delivers dependable results. - Smart Audio Processing - Real-time frequency analysis with noise filtering for accurate readings in various acoustic environments. - Clean Interface - No clutter, just essential functionality. The straightforward design keeps important controls accessible without distractions. - Quick Response - Fast pitch recognition and visual feedback help you achieve proper intonation efficiently. - Cross-Platform - Works seamlessly on iPhone, iPad, and modern devices with responsive design that adapts to any screen size. - Multilingual - Available in 15 languages including English, French, Spanish, German, Portuguese, Italian, Chinese, Japanese, Korean, Russian, Turkish, Swedish, Danish, Dutch and Arabic. - Privacy Focused - We do not collect any data. No tracking, no analytics, no personal information collected or shared. Just pure functionality without compromising your privacy. Proudly powered by https://OnlineTuner.org, Raw Tuner represents reliable audio engineering in an essential musician's tool. This tuner was crafted by Samuel Haddad-Bacry using modern web technologies. Built with Pitchy.js for audio analysis, CapacitorJS for cross-platform performance, and the W3CSS framework for clean styling.
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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.