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.
The highest-rated screenwiting app on the Mac App Store comes to iOS!
$19.99 · 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 Slugline: Simply Screenwriting: map the core Productivity 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 formatting options for scripts
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Unintuitive navigation between projects and editing
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of collaboration features
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High price point with limited trial options
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.
The highest-rated screenwiting app on the Mac App Store comes to iOS! Slugline is a minimal, distraction-free environment for the most important part of screenwriting—the writing part. Slugline works with plain text. It automatically turns your writing into a properly formatted screenplay, without you ever needing to press the Tab key. FEATURES ⋮ Automatic formatting ⋮ Sync files with iCloud and Dropbox, or work locally ⋮ Printed on paper or PDF, your screenplay is indistinguishable from one made with apps costing much more ⋮ Helpful structure templates, including the famous beat sheet from Save the Cat!® ⋮ Slugline’s famous Integrated outlining ⋮ Notes, Scene Synopses, and Omitted text help keep you organized ⋮ Includes Courier Prime, a beautiful typeface designed for screenplays • THE POWER OF PLAIN Slugline uses the free and open Fountain screenplay format, which is nothing more than plain text. You can work on your screenplay anywhere, using any writing app. When you open it in Slugline again, everything will be there, properly formatted. • INTEGRATED OUTLINING Start with an outline, then seamlessly transition to writing scenes. Or jot down a placeholder for your third-act twist while you’re still crafting your opening pages. Slugline allows you to be as structured as you like, even if that means not at all. • WE WANT TO HEAR FROM YOU Slugline keeps getting better, and that's thanks to you! Slug us a line at http://slugline.co/contact with any questions or feedback you have, and follow us on Twitter at @SluglineApp.
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.