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.
Great for demos, first takes, and fresh ideas: voice and guitar at the kitchen table, or a band passing one phone around the room.
$6.99 · 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 Blueprint 4-Track: 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: Users often find it challenging to navigate between features.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited audio effects and mixing features compared to more advanced apps.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Occasional bugs when saving projects.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Some users feel the pricing is high for the offered 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.
Great for demos, first takes, and fresh ideas: voice and guitar at the kitchen table, or a band passing one phone around the room. The sound of the machine is built in. Each track has its own set of knobs and there is no undo. - Records one track at a time, from the built-in mic, a headset mic, or a USB audio interface. - Sends any track through a space echo with spring reverb. - Bends pitch and tempo together with a varispeed knob in the master panel. - Has track merging/clearing, punch-in recording, and a metronome. - Your recordings are WAV files saved on your phone. Share the song, or export the whole session. - Works entirely offline and collects nothing. - Pay once. No subscription, no ads, no account. - Works on iPhone and iPad. TIPS - Overdub with wired headphones, so the mic doesn't pick up the other tracks. - Don't use Bluetooth headphones while recording: they add delay, and only play in mono. - Tap record while playing to punch in over a part you want to redo. - Tap the ? at the top left for a guide to the controls. Blueprint is made by one person. If something feels confusing or missing, email [email protected] and I will answer.
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.