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.
Polaris is an intuitive music-making app designed to help you turn your musical ideas into reality
$4.99 · 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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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 Polaris - Pocket Music Maker: 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 instrument selection compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No collaboration features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No tutorial or onboarding experience
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.
Polaris is an intuitive music-making app designed to help you turn your musical ideas into reality. By stripping away the complexity of traditional desktop software and DAWs (Digital Audio Workstations), it provides a streamlined space to sketch, develop, and refine your work. Whether you are crafting a drum beat or a melodic electronic arrangement, Polaris is built to keep your creativity flowing. --- Capture ideas instantly --- The interface is designed to be accessible yet powerful. Use the modern, grid-based step sequencer to lay down drums, basslines, and melodies in seconds. With a design philosophy inspired by classic hardware, you can skip the setup time and get straight to the fun part: making music. --- Powerful sequencing --- Don't let the simple interface fool you, Polaris offers deep creative possibilities. • Six tracks: combine different sounds to build complete patterns • Step modulation: add movement by automating volume, cutoff, decay, and pitch on a per-step basis • Advanced rhythm: use per-track rate control, swing, and trig conditions to keep your sequences fresh • Extended patterns: chain up to 8 grids for sequences up to 128 steps --- Deep sound design --- Sculpt your own unique sound using a flexible dual-engine architecture. • Sample engine: use 75 factory samples or import your own for limitless exploration • Synth engine: create lush pads, deep bass, and plucky leads with the dual-oscillator synthesizer • Shape your tone: every track features its own multimode filter and distortion unit --- Mix, process, export --- Fine-tune your project with the built-in mixing console. Add space using dedicated reverb and delay sends. When you are ready, capture your performance in real-time with the built-in recorder. Your ideas are exported as perfectly cut audio loops, ready for any other music software. --- Built for iOS --- Polaris fits right into your existing mobile studio setup. • Standalone: use it as a complete, all-in-one music production station • AUv3 support: load Polaris as a plugin within your favorite iOS hosts (like GarageBand, AUM, ...) for a multi-app workflow Download Polaris today and start making music whenever inspiration strikes.
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.