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.
Multi-Track Song Recorder Pro is a premier 4 track recording app
$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 Multi Track Song Recorder Pro: 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 functionality for mixing tracks compared to professional apps
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface can be confusing for beginners
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Performance issues with multiple tracks recording simultaneously
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Low user ratings due to crashes
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.
Multi-Track Song Recorder Pro is a premier 4 track recording app. MTSR Pro allows you to record up to 4 tracks with a simple and easy to use interface. Designed with a simple tape recording style and with many features for creative and more advanced music recording. Includes a pendulum-style Metronome with options for creating Perfect Loops and duplicating your recordings to loop as many times as you’d like. Features options for merging all of your tracks in to allow for unlimited recording possibilities. You can also export your songs via Dropbox, Email, SMS, and iTunes File Sharing. Multi Track Song Recorder is the perfect iOS app for musicians looking to write and record simple songs at home or on the move! Includes: - Pause, seek, and scrub through recorded audio easily - Option of viewing your recordings as Waveforms or with Volume Meters - Option of merging all recorded tracks - Includes pendulum-style Metronome with options for enabling audible taps, tap your tempo for finding the perfect BPM to your song, and perfect looping which trims the audio of your recordings so that your track will loop to the beat! - Independent volume control on each track for simple mixing - Input gain control for each track - Input monitoring while headphones are plugged in - Simple saving and loading of your Songs - Allows you to import music from your device's music library as well as from other apps with the ‘Open in...’ feature - Dropbox support, you can export your current song or all saved songs directly to your Dropbox account
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.