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.
Crayon Style is a painting application reproducing the warm experience of drawing with crayons
$2.99 · 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 Crayon Style: map the core Entertainment 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 drawing tools compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent performance on older devices.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social features for sharing and collaboration.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited export options for created drawings.
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.
Crayon Style is a painting application reproducing the warm experience of drawing with crayons. Transform your iPhone or iPad into a sheet of drawing paper and enjoy creating all kinds of drawings ranging from doodling and sketching to full-blown art. Crayon Style's simple and stylish user interface is light and easy to use, allowing you to enjoy the application anywhere and at any time. Use it in all kinds of situations to note down ideas, sketch scenery, create illustrations, etc. - Drawing engine reproducing the appearance of crayon art. Crayon Style's original drawing engine simulates the characteristics of drawing with crayons, such as rough lines, pigment depth and the mixed colors produced when layering strokes, reproducing faithfully the warm look and feel of crayon art. -Set photos you like as a background with Sketch Guide. With the Sketch Guide feature, you can set a photo or image as a background to your drawing. Use it to trace over a picture you like or to create an original coloring page. - Smart and fun user interface. With its polished design, seamless screen transitions and casual feel, the user interface feels good and is fun to use. Combined with the features above, you get a simple and smart application which can be enjoyed by children and adults alike. - Share your artwork on social networks! You can post your illustrations to social networks such as Facebook and Twitter using the "Share..." functionality. - Easier, more natural drawing. Supports Apple Pencil and 3D Touch. You can pleasantly draw using your fingers, but you can experience an even more wonderful drawing experience by using a stylus. The app supports stroke pressure with the iPad Pro's Apple Pencil. On the iPhone, the app uses 3D Touch to simulate stroke pressure and unlock more shades of color. With the 3D Touch functionality, it is possible to use stroke pressure with your finger as well as standard styluses. ■Main Features - Drawing engine reproducing the look and feel of crayon art. - 24 colors available. - Rub colors with the sponge tool to blend them together. - Eraser tool. - Color selection history (up to 3 colors). - 5 levels of line thickness (line thickness saved separately for each tool). - Undo / Redo (up to 4 times each). - Enlarge, reduce and rotate the canvas. - Toolbar can be moved to the top or bottom of the screen. - Artwork gallery feature. - Set a photo or image as a background with the Sketch Guide feature. - Output (export) to: - Camera roll (jpg format) - Share.. - Open In.. - Supports Apple Pencil (pressure). - Supports 3D Touch.
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.